J. Hallas

发表

Evidence of Depression Provoked by Cardiovascular Medication: A Prescription Sequence Symmetry Analysis

J. Hallas, 1996, Epidemiology.

Poster session

A. Bate, J. Hallas, G. Requena, 2009, 2009 Device Research Conference.

Use of exenatide and liraglutide in Denmark: a drug utilization study

J. Hallas, A. Pottegård, F. Knop, 2014, European Journal of Clinical Pharmacology.

The mephenytoin oxidation polymorphism is partially responsible for the N‐demethylation of imipramine

J. Hallas, E. Skjelbo, K. Brøsen, 1991, Clinical pharmacology and therapeutics.

Is the shock index a universal predictor in the emergency department? A cohort study

J. Hallas, N. Shapiro, AK Kristensen, 2015, Critical Care.

Sex differences in text-mined possible adverse drug events associated with drugs for psychosis

S. Brunak, J. Hallas, R. Eriksson, 2020, Journal of psychopharmacology.

Complicated and Uncomplicated Peptic Ulcers in a Danish County 1993–2002: A Population-Based Cohort Study

J. Hallas, A. Lassen, Ove BSchaffalitzky de Muckadell, 2006, The American Journal of Gastroenterology.

Nurse tele‐consultations with discharged COPD patients reduce early readmissions – an interventional study

J. Hallas, A. Sorknæs, Hanne Madsen, 2011, The clinical respiratory journal.

Association between diabetes and oncological outcomes in patients undergoing neoadjuvant chemo-radiotherapy for rectal cancer.

J. Hallas, L. Thygesen, I. Gögenur, 2019, Surgical oncology.

J. Hallas, B. Harvald, K. Brøsen, 1990, Journal of internal medicine.

The European Network of Centres for Pharmacoepidemiology and Pharmacovigilance (ENCePP). Guide on Methodological Standards in Pharmacoepidemiology (Revision 1, 2012, Revision 2, 2013, Revision 3, 2014)).

A. Fourrier-Réglat, J. Hallas, S. Evans, 2012 .

Likelihood of reporting medication errors in hospitalized children: a survey of nurses and physicians

J. Hallas, A. B. Almarsdóttir, R. Rishoej, 2018, Therapeutic advances in drug safety.

Metformin treatment does not affect the risk of ruptured abdominal aortic aneurysms

J. Hallas, A. Pottegård, J. Lindholt, 2017, Journal of vascular surgery.

Cervical cancer survivors and health care use: A Danish population-based register study.

Miguel Vazquez-Prada Baillet, J. Hallas, P. T. Jensen, 2021, Gynecologic oncology.

Selective Serotonin Reuptake Inhibitors and the Risk of Stroke: A Population-Based Case-Control Study

J. Hallas, K. Christensen, I. Tsiropoulos, 2002, Stroke.

Association of Potent and Very Potent Topical Corticosteroids and the Risk of Osteoporosis and Major Osteoporotic Fractures.

J. Hallas, A. Pottegård, J. Thyssen, 2021, JAMA dermatology.

Nonsteroidal anti-inflammatory drugs and upper gastrointestinal bleeding, identifying high-risk groups by excess risk estimates.

J. Hallas, J. Lauritsen, L. Gram, 1995, Scandinavian journal of gastroenterology.

Templates for analysis of individual-level prescription data.

Jesper Hallas, Henrik Støvring, J. Hallas, 2006, Basic & clinical pharmacology & toxicology.

S2045796021000159jra 1..11

J. Hallas, C. Correll, K. Andersen, 2021 .

A Danish Nationwide Drug Utilization Study

J. Hallas, A. Pottegård, P. Damkier, 2019 .

Montelukast use—a 19-year nationwide drug utilisation study

J. Hallas, A. Pottegård, Anders Christiansen, 2017, European Journal of Clinical Pharmacology.

Patterns of finasteride use in the male populations of four Nordic countries: A cross-national drug utilization study

A. Green, J. Hallas, K. Stavem, 2016, Scandinavian journal of urology.

Deviant patterns of methylphenidate use in adults: a Danish nationwide registry‐based drug utilization study

J. Hallas, A. Pottegård, Lotte Rasmussen, 2015, Pharmacoepidemiology and drug safety.

Use of Antibiotics in Children: A Danish Nationwide Drug Utilization Study

J. Hallas, A. Pottegård, P. Damkier, 2015, The Pediatric infectious disease journal.

The use of medication against attention deficit/hyperactivity disorder in Denmark: a drug use study from a patient perspective

J. Hallas, A. Pottegård, D. Glintborg, 2012, European Journal of Clinical Pharmacology.

Use of lithium in the adult populations of Denmark, Norway and Sweden.

J. Hallas, G. R. Weitoft, J. Bramness, 2009, Journal of affective disorders.

Persistence of antimuscarinic drug use

J. Hallas, S. Brostrøm, 2009, European Journal of Clinical Pharmacology.

PHARMACOEPIDEMIOLOGY AND PRESCRIPTION

J. Hallas, J. Kragstrup, L. Bjerrum, 1997 .

The Danish prescription registries.

H. Sørensen, J. Hallas, D. Gaist, 1997, Danish medical bulletin.

Inappropriate use of sumatriptan: population based register and interview study

B. Rasmussen, J. Hallas, J. Kragstrup, 1998, BMJ.

Postponement of Death by Pharmacological Heart Failure Treatment: A Meta-Analysis of Randomized Clinical Trials.

A. Hrõbjartsson, J. Hallas, A. Pottegård, 2020, The American journal of medicine.

Use of single and combined antithrombotic therapy and risk of serious upper gastrointestinal bleeding: population based case-control study

J. Hallas, A. Lassen, C. Aalykke, 2006, BMJ : British Medical Journal.

Characteristics of New Users of Aclidinium Bromide, Aclidinium/Formoterol, and Other COPD Medications in the United Kingdom, Denmark, and Germany

J. Hallas, A. Pottegård, A. Rubino, 2022, Clinical Drug Investigation.

Pharmaceutical interventions on prescription problems in a Danish pharmacy setting

J. Hallas, A. Pottegård, J. Søndergaard, 2011, International Journal of Clinical Pharmacy.

Postponement of Death by Statin Use: a Systematic Review and Meta-analysis of Randomized Clinical Trials

A. Hrõbjartsson, J. Hallas, A. Pottegård, 2019, Journal of General Internal Medicine.

Use of Low-Dose Aspirin and Mortality After Prostate Cancer Diagnosis

J. Hallas, S. Dalton, M. Borre, 2019, Annals of Internal Medicine.

Use of low-dose aspirin and non-aspirin nonsteroidal anti-inflammatory drugs and risk of glioma: a case–control study

H. Sørensen, J. Hallas, S. Friis, 2013, British Journal of Cancer.

Discontinuation of Antiplatelet Treatment and Risk of Recurrent Stroke and All-Cause Death: A Cohort Study

J. Hallas, A. Pottegård, R. dePont Christensen, 2014, Neuroepidemiology.

Use of proton pump inhibitors and the risk of community-acquired pneumonia: a population-based case-control study.

J. Hallas, C. Pedersen, T. G. Jensen, 2007, Archives of internal medicine.

Oral Immunosuppressive Treatment of Myasthenia Gravis in Denmark: A Nationwide Drug Utilization Study, 1996–2013

J. Hallas, A. Pottegård, D. Gaist, 2018, Basic & clinical pharmacology & toxicology.

Use of opioids in a Danish population-based cohort of cancer patients.

J. Hallas, J. Kragstrup, G. Engholm, 2005, Journal of pain and symptom management.

Short- and long-term mortality in patients with community-acquired severe sepsis and septic shock

Jesper Hallas, J. Hallas, M. Storgaard, 2013, Scandinavian journal of infectious diseases.

Increased short- and long-term mortality among patients with infectious spondylodiscitis compared with a reference population.

J. Hallas, A. Lassen, C. Pedersen, 2015, The spine journal : official journal of the North American Spine Society.

case-control study gastrointestinal bleeding: population based therapy and risk of serious upper Use of single and combined antithrombotic

J. Hallas, A. Andries, M. Andersen, 2006 .

Persistence and adherence to non-vitamin K antagonist oral anticoagulant treatment in patients with atrial fibrillation across five Western European countries

J. Hallas, A. Pottegård, P. Hjemdahl, 2021, Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology.

Long-term use of antiplatelet drugs by patients with transient ischaemic attack

J. Hallas, D. Gaist, S. Bak, 2014, European Journal of Clinical Pharmacology.

Risk of Stroke Associated With Nonsteroidal Anti-Inflammatory Drugs: A Nested Case-Control Study

J. Hallas, K. Christensen, I. Tsiropoulos, 2003, Stroke.

Cardiovascular Risk in Users of Mirabegron Compared with Users of Antimuscarinic Treatments for Overactive Bladder: Findings from a Non-Interventional, Multinational, Cohort Study

J. Rumsfeld, J. Hallas, T. Auton, 2021, Drug Safety.

Lack of Association Between Proton Pump Inhibitor Use and Cognitive Decline

J. Hallas, K. Christensen, M. Wod, 2018, Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association.

Qualitative exploration of practices to prevent medication errors in neonatal intensive care units: a focus group study

J. Hallas, A. B. Almarsdóttir, R. Rishoej, 2018, Therapeutic advances in drug safety.

Phenobarbital compared to benzodiazepines in alcohol withdrawal treatment: A register-based cohort study of subsequent benzodiazepine use, alcohol recidivism and mortality.

Jesper Hallas, Anders Fink-Jensen, J. Hallas, 2016, Drug and alcohol dependence.

The Danish National Prescription Registry in studies of a biological pharmaceutical: palivizumab – validation against two external data sources

J. Hallas, L. Pedersen, L. Stensballe, 2015, Clinical epidemiology.

Concurrent use of more than one major psychotropic drug (polypsychopharmacy) in out-patients--a prescription database study.

J. Hallas, L. Gram, J. Rosholm, 1994, British journal of clinical pharmacology.

The effect of statins on average survival in randomised trials, an analysis of end point postponement

J. Hallas, P. Christensen, Malene Elisa Lopez Kristensen, 2015, BMJ Open.

Prevalence and quality of antihypertensive therapy among hypertension patients enrolled in the Ghana National Health Insurance Scheme

J. Hallas, A. Pottegård, F. Asenso-Boadi, 2021, Pharmacoepidemiology and drug safety.

Effect of Allopurinol on Cardiovascular Outcomes in Hyperuricemic Patients: A Cohort Study.

J. Hallas, A. Pottegård, K. S. Larsen, 2016, The American journal of medicine.

Is urate crystal precipitation a predictor of cardiovascular risk in hyperuricemic patients? A Danish cohort study

J. Hallas, A. Pottegård, K. S. Larsen, 2015, Arthritis Research & Therapy.

Syddansk Universitet Is urate crystal precipitation a predictor of cardiovascular risk in hyperuricemic patients ?

J. Hallas, A. Pottegård, K. S. Larsen, 2015 .

Esophagitis: Incidence and Risk of Esophageal Adenocarcinoma—A Population-Based Cohort Study

J. Hallas, A. Lassen, O. S. Muckadell, 2006, The American Journal of Gastroenterology.

Urinary tract infections and risk of squamous cell carcinoma bladder cancer: A Danish nationwide case–control study

J. Hallas, A. Pottegård, M. Nørgaard, 2019, International journal of cancer.

CLEP_A_311450 569..579

J. Hallas, A. Pottegård, S. Friis, 2021 .

Impact of EMA regulatory label changes on systemic diclofenac initiation, discontinuation, and switching to other pain medicines in Scotland, England, Denmark, and The Netherlands

J. Hallas, A. Pottegård, A. Doney, 2020, Pharmacoepidemiology and drug safety.

Description of a practice model for pharmacist medication review in a general practice setting

J. Hallas, A. Pottegård, T. Graabæk, 2014, Pharmacy practice.

Do educational meetings and group detailing change adherence to drug formularies in hospitals? A cluster randomized controlled trial

J. Hallas, R. Christensen, L. J. Kjeldsen, 2014, European Journal of Clinical Pharmacology.

Using multiple random index dates with the reverse waiting time distribution improves precision of estimated prescription durations

J. Hallas, E. Skovlund, H. Støvring, 2021, Pharmacoepidemiology and drug safety.

Estimating medication stopping fraction and real‐time prevalence of drug use in pharmaco‐epidemiologic databases. An application of the reverse waiting time distribution

J. Hallas, A. Pottegård, H. Støvring, 2017, Pharmacoepidemiology and drug safety.

Refining estimates of prescription durations by using observed covariates in pharmacoepidemiological databases: an application of the reverse waiting time distribution

J. Hallas, A. Pottegård, H. Støvring, 2017, Pharmacoepidemiology and drug safety.

Assigning exposure duration to single prescriptions by use of the waiting time distribution

Jesper Hallas, J. Hallas, A. Pottegård, 2013, Pharmacoepidemiology and drug safety.

Bias in case‐crossover studies of medications due to persistent use: A simulation study

J. Gagne, J. Hallas, A. Pottegård, 2020, Pharmacoepidemiology and drug safety.

Angiotensin II receptor blockers are safe in patients with prior angioedema related to angiotensin‐converting enzyme inhibitors – a nationwide registry‐based cohort study

J. Hallas, A. Pottegård, P. Homøe, 2019, Journal of internal medicine.

Angiotensin II receptor blockers are safe in patients with prior angioedema related to angiotensin converting enzyme inhibitors a nationwide registrybased cohort study

J. Hallas, A. Pottegård, P. Homøe, 2018 .

Use of beta-blockers and risk of serious upper gastrointestinal bleeding: a population-based case-control study

J. Hallas, A. Pottegård, P. Damkier, 2017, Therapeutic advances in gastroenterology.

Comparison of cardiovascular events among treatments for overactive bladder: a Danish nationwide cohort study

J. Hallas, A. Pottegård, A. Margulis, 2017, European Journal of Clinical Pharmacology.

Syddansk Universitet Use of beta-blockers and risk of serious upper gastrointestinal bleeding a population-based case-control study

J. Hallas, A. Pottegård, P. Damkier, 2017 .

Using probability of drug use as independent variable in a register‐based pharmacoepidemiological cause‐effect study—An application of the reverse waiting time distribution

J. Hallas, A. Pottegård, H. Støvring, 2017, Pharmacoepidemiology and drug safety.

Long-Term Lithium Use and Risk of Renal and Upper Urinary Tract Cancers.

J. Hallas, A. Pottegård, S. Friis, 2016, Journal of the American Society of Nephrology.

Long-term use of antiplatelet drugs by stroke patients: a follow-up study based on prescription register data

J. Hallas, R. Christensen, D. Gaist, 2012, European Journal of Clinical Pharmacology.

Concurrent use of tramadol and oral vitamin K antagonists and the risk of excessive anticoagulation: a register-based nested case–control study

J. Hallas, A. Pottegård, R. Christensen, 2013, European Journal of Clinical Pharmacology.

Using the “proportion of patients covered” and the Kaplan‐Meier survival analysis to describe treatment persistence

N. Pratt, J. Hallas, A. Pottegård, 2018, Pharmacoepidemiology and drug safety.

The validity of self‐reported use of hormone replacement therapy among Danish nurses

J. Hallas, B. Heitmann, S. Johnsen, 2004, Acta obstetricia et gynecologica Scandinavica.

Empirical validation of the reverse parametric waiting time distribution and standard methods to estimate prescription durations for warfarin

J. Hallas, A. Pottegård, J. Thrane, 2018, Pharmacoepidemiology and drug safety.

Prescription duration and treatment episodes in oral glucocorticoid users: application of the parametric waiting time distribution

H. Sørensen, J. Hallas, A. Pottegård, 2017, Clinical epidemiology.

Lipid-Lowering Drugs and Risk of Myopathy: A Population-Based Follow-Up Study

J. Hallas, C. Huerta, S. Sindrup, 2001, Epidemiology.

Methodological approaches for medication error analyses in patient safety and pharmacovigilance reporting systems: a scoping review protocol

J. Hallas, S. B. Bogh, Sebrina Hansen, 2022, BMJ Open.

J. Hallas, L. Gram, E. Grodum, 1991, Scandinavian journal of gastroenterology.

J. Hallas, K. Brøsen, L. Gram, 1991, Danish medical bulletin.

Development and Validation of a Nordic Multimorbidity Index Based on Hospital Diagnoses and Filled Prescriptions

P. B. Jensen, J. Hallas, A. Pottegård, 2022, Clinical epidemiology.

Association of Statin Use and Oncological Outcomes After Neoadjuvant Radiotherapy in Patients With Rectal Cancer

J. Hallas, L. Thygesen, I. Gögenur, 2019, AntiCancer Research.

A MiniReview of the use of hospital-based databases in observational inpatient studies of drugs.

J. Hallas, T. Cars, M. Larsen, 2013, Basic & clinical pharmacology & toxicology.

Screening, prevention and treatment of osteoporosis in patients with chronic obstructive pulmonary disease – a population‐based database study

J. Hallas, K. Brixen, Hanne Madsen, 2010, The clinical respiratory journal.

Exposure to antiepileptic drugs and the risk of hip fracture: A case‐control study

J. Hallas, I. Tsiropoulos, J. Lauritsen, 2008, Epilepsia.

Risk of lactic acidosis in type 2 diabetes patients using metformin: A case control study

J. Hallas, A. Pottegård, H. Beck-Nielsen, 2018, PloS one.

Identifying and assessing potential harm of medication errors and potentially unsafe medication practices in paediatric hospital settings: a field study

J. Hallas, A. B. Almarsdóttir, R. Rishoej, 2018, Therapeutic advances in drug safety.

Systemic hormone therapy and dementia: A nested case-control and co-twin control study.

J. Hallas, K. Christensen, M. Osler, 2022, Maturitas.

Extent of arterial calcification by conventional vitamin K antagonist treatment

J. Hallas, J. Lindholt, A. Diederichsen, 2020, PloS one.

Statin use and survival following glioblastoma multiforme.

H. Sørensen, J. Hallas, S. Friis, 2014, Cancer epidemiology.

Association Between Selective Serotonin Reuptake Inhibitor Use and erious Upper Gastrointestinal Bleeding

J. Hallas, O. B. Schaffalitzky de Muckadell, A. Lassen, 2022 .

Long‐term oral budesonide treatment and risk of osteoporotic fractures in patients with microscopic colitis

J. Hallas, G. L. Nielsen, O. Bonderup, 2020, Alimentary pharmacology & therapeutics.

Associations of low-dose aspirin or other NSAID use with prostate cancer risk in the Danish Diet, Cancer and Health Study

A. Tjønneland, H. Sørensen, J. Hallas, 2019, Cancer Causes & Control.

Impact of Urate Level on Cardiovascular Risk in Allopurinol Treated Patients. A Nested Case-Control Study

J. Hallas, A. Pottegård, H. Lindegaard, 2016, PloS one.

Validity of the Prescriber Information in the Danish National Prescription Registry

J. Hallas, A. Pottegård, Lotte Rasmussen, 2016, Basic & clinical pharmacology & toxicology.

Use of proton pump inhibitors after antireflux surgery: a nationwide register-based follow-up study

J. Hallas, A. Pottegård, P. Bytzer, 2014, Gut.

The Association between Use of Serotonergic Antidepressants and Perioperative Bleeding during Total Hip Arthroplasty – A Cohort Study

J. Hallas, M. Dall, T. Nymark, 2014, Basic & clinical pharmacology & toxicology.

Re‐prescribing of causative drugs in persons discharged after serious drug‐induced upper gastrointestinal bleeding

J. Hallas, O. B. Schaffalitzky de Muckadell, A. Lassen, 2012, Alimentary pharmacology & therapeutics.

Helicobacter pylori and risk of upper gastrointestinal bleeding among users of selective serotonin reuptake inhibitors

J. Hallas, O. B. Schaffalitzky de Muckadell, M. Dall, 2011, Scandinavian journal of gastroenterology.

There is an association between selective serotonin reuptake inhibitor use and uncomplicated peptic ulcers: a population‐based case–control study

J. Hallas, O. B. Schaffalitzky de Muckadell, A. Lassen, 2010, Alimentary pharmacology & therapeutics.

PHARMACOEPIDEMIOLOGY AND PRESCRIPTION

J. Hallas, J. Kragstrup, L. Bjerrum, 1997 .

The Waiting Time Distribution as a Graphical Approach to Epidemiologic Measures of Drug Utilization

J. Hallas, L. Bjerrum, D. Gaist, 1997, Epidemiology.

Does administration of vaginal estrogens increase the risk of venous thromboembolism: A case–control study

J. Hallas, E. Nielsen, L. Lund, 2021, Basic & clinical pharmacology & toxicology.

Use of Proton Pump Inhibitors and the Risk of Community-Acquired Pneumonia

J. Hallas, T. G. Jensen, S. Gulmez, 2017 .

The use of medication against attention deficit hyperactivity disorder in Denmark: a drug use study from a national perspective

J. Hallas, A. Pottegård, D. Glintborg, 2012, European Journal of Clinical Pharmacology.

Pharmacoepidemiology – current opportunities and challenges

J. Hallas, 2009 .

Bringing epidemiology into drug utilisation research

J. Avorn, J. Hallas, J. LeLorier, 2003, Pharmacoepidemiology and drug safety.

Outpatient utilization of antidepressants: a prescription database analysis.

J. Hallas, L. Gram, J. Rosholm, 1993, Journal of affective disorders.

Are young adults with asthma treated sufficiently with inhaled steroids? A population-based study of prescription data from 1991 and 1994.

J. Hallas, N. Hansen, L. Gram, 2003, British journal of clinical pharmacology.

Antidepressant treatment in general practice--an interview study.

J. Hallas, L. Gram, N. Damsbo, 1995, Scandinavian journal of primary health care.

Risk of Acute Liver Injury in Agomelatine and Other Antidepressant Users in Four European Countries: A Cohort and Nested Case–Control Study Using Automated Health Data Sources

J. Hallas, A. Pottegård, B. Falissard, 2019, CNS Drugs.

Use of Topical Tacrolimus and Topical Pimecrolimus in Four European Countries: A Multicentre Database Cohort Study

K. Rothman, J. Hallas, A. Pottegård, 2018, Drugs - Real World Outcomes.

Topical Antimycotics for Oral Candidiasis in Warfarin Users

J. Hallas, A. Pottegård, E. Grove, 2017, Basic & clinical pharmacology & toxicology.

University of Southern Denmark Impact of Urate Level on Cardiovascular Risk in Allopurinol Treated Patients . A Nested Case-Control Study

J. Hallas, H. Lindegaard, L. Larsen, 2016 .

Subdural hematoma cases identified through a Danish patient register: diagnosis validity, clinical characteristics, and preadmission antithrombotic drug use

J. Hallas, A. Pottegård, F. Poulsen, 2016, Pharmacoepidemiology and drug safety.

Syddansk Universitet Impact of Urate Level on Cardiovascular Risk in Allopurinol Treated Patients . A Nested Case-Control

J. Hallas, Larsen, K. Søltoft, 2016 .

Comparison of mortality in patients with acute myocardial infarction accidentally admitted to non-cardiology departments versus that in patients admitted to coronary care units.

J. Hallas, K. Thygesen, G. Gislason, 2014, The American journal of cardiology.

The influence of hospital drug formulary policies on the prescribing patterns of proton pump inhibitors in primary care

J. Hallas, M. Larsen, M. Schou, 2014, European Journal of Clinical Pharmacology.

Use of antibiotics for urinary tract infection in women undergoing surgery for urinary incontinence: a cohort study

J. Hallas, B. Nørgård, R. Guldberg, 2014, BMJ Open.

Dynamics of vitamin K antagonist and new oral anticoagulants use in atrial fibrillation: a Danish drug utilization study

J. Hallas, A. Pottegård, B. Poulsen, 2014, Journal of thrombosis and haemostasis : JTH.

Prognosis in patients with suspected or known ischemic heart disease and normal myocardial perfusion: Long-term outcome and temporal risk variations

S. Hess, J. Hallas, W. Vach, 2013, Journal of Nuclear Cardiology.

Cancer incidence in persons with elevated cobalamin levels

J. Hallas, M. Nybo, J. Ryg, 2013, European journal of clinical investigation.

Use of symptom-relieving drugs before and after surgery for urinary incontinence in women: a cohort study

J. Hallas, B. Nørgård, R. Guldberg, 2013, BMJ Open.

Long term use of drugs affecting the reninangiotensin system and the risk of cancer: a populationbased casecontrol study

J. Hallas, S. Friis, R. Christensen, 2012 .

Identifying Patients with Myasthenia for Epidemiological Research by Linkage of Automated Registers

J. Hallas, D. Gaist, E. Pedersen, 2011, Neuroepidemiology.

Do statins protect against upper gastrointestinal bleeding?

J. Hallas, A. Lassen, C. Aalykke, 2009, British journal of clinical pharmacology.

Cancer Risk in Long-term Users of Valproate: A Population-Based Case-Control Study

J. Hallas, S. Friis, K. Grønbæk, 2009, Cancer Epidemiology Biomarkers & Prevention.

Antibiotics active against Chlamydia do not reduce the risk of myocardial infarction

J. Hallas, M. Andersen, L. Bjerrum, 2005, European Journal of Clinical Pharmacology.

The risk of missed gastroesophageal cancer diagnoses in users and nonusers of antisecretory medication.

J. Hallas, A. Lassen, O. B. D. de Muckadell, 2005, Gastroenterology.

First-time endoscopy and use of antisecretory medication: A population-based cohort study

J. Hallas, A. Lassen, O. B. D. de Muckadell, 2005, Scandinavian journal of gastroenterology.

Helicobacter pylori test and eradicate versus prompt endoscopy for management of dyspeptic patients: 6.7 year follow up of a randomised trial

J. Hallas, O. B. Schaffalitzky de Muckadell, A. Lassen, 2004, Gut.

Use of anti‐secretory medication: a population‐based cohort study

J. Hallas, O. B. Schaffalitzky de Muckadell, A. Lassen, 2004, Alimentary pharmacology & therapeutics.

Cancer patients' share in a population's use of opioids. A linkage study between a prescription database and the Danish Cancer Registry.

J. Hallas, J. Kragstrup, M. Andersen, 2004, Journal of pain and symptom management.

Eradication of Helicobacter pylori and use of antisecretory drugs: population based cohort study

J. Hallas, A. Lassen, O. B. D. de Muckadell, 2003, BMJ : British Medical Journal.

Selective Serotonin Reuptake Inhibitors and the Risk of Stroke

J. Hallas, K. Christensen, I. Tsiropoulos, 2002 .

Treatment failures after antibiotic therapy of uncomplicated urinary tract infections. A prescription database study

R. Dessau, J. Hallas, L. Bjerrum, 2002, Scandinavian journal of primary health care.

Individualized drug utilization statistics

J. Hallas, A. Nissen, 1994, European Journal of Clinical Pharmacology.

Data Resource Profile: Danish online drug use statistics (MEDSTAT).

J. Hallas, S. Friis, Morten Schmidt, 2016, International Journal of Epidemiology.

Individual utilization of anti‐asthma medication by young adults: a prescription database analysis

J. Hallas, Nicholas Hansen, 1993, Journal of internal medicine.

Misuse of sumatriptan

J. Hallas, S. Sindrup, D. Gaist, 1994, The Lancet.

Hormone replacement therapy increases the risk of cranial meningioma.

J. Hallas, S. Friis, P. Ravn, 2013, European journal of cancer.

Sequence symmetry analysis in pharmacovigilance and pharmacoepidemiologic studies

Yea-Huei Kao Yang, Nicole Pratt, Jesper Hallas, 2017, European Journal of Epidemiology.

Adverse events with use of antiepileptic drugs: a prescription and event symmetry analysis

Jesper Hallas, Ioannis Tsiropoulos, Morten Andersen, 2009, Pharmacoepidemiology and drug safety.

Hypothesis-free screening of large administrative databases for unsuspected drug-outcome associations

J. Gagne, S. Schneeweiss, N. Pratt, 2018, European Journal of Epidemiology.

Can the use of Computer Decision Support System prevent ulcer complication among patients treated with NSAID or Aspirin? A randomised controlled trial in General Practice

Jesper Hallas, J. Hallas, Maria Munch Storsveen, 2017 .

Use of benzodiazepines or benzodiazepine related drugs and the risk of cancer: a population-based case-control study.

Jesper Hallas, Morten Andersen, J. Hallas, 2013, British journal of clinical pharmacology.

Reply to ‘Evidence for harm, comment on . . .’ by Kripke & Langer.

J. Hallas, A. Pottegård, S. Friis, 2014, British journal of clinical pharmacology.

Hypnotics' association with mortality or cancer: bias related to the study design and analysis

J. Hallas, A. Pottegård, S. Friis, 2012 .

Generic Switching and Non-Persistence among Medicine Users: A Combined Population-Based Questionnaire and Register Study

Jesper Hallas, Jens Søndergaard, Morten Andersen, 2015, PloS one.

Low-dose aspirin or other nonsteroidal anti-inflammatory drug use and prostate cancer risk: a nationwide study

Jesper Hallas, Christian Dehlendorff, Henrik Toft Sørensen, 2016, Cancer Causes & Control.

Is Shock Index a Valid Predictor of Mortality in Emergency Department Patients With Hypertension, Diabetes, High Age, or Receipt of β- or Calcium Channel Blockers?

Jesper Hallas, Annmarie Lassen, J. Hallas, 2016, Annals of emergency medicine.

Systolic blood pressure and short-term mortality in the emergency department and prehospital setting: a hospital-based cohort study

Jesper Hallas, Annmarie Lassen, J. Hallas, 2015, Critical Care.

New use of prescription drugs prior to a cancer diagnosis

Jesper Hallas, J. Hallas, A. Pottegård, 2016, Pharmacoepidemiology and drug safety.

Incidence of Common Cancers in Users of Antimuscarinic Medications for Overactive Bladder: A Danish Nationwide Cohort Study

J. Hallas, A. Pottegård, A. Margulis, 2018, Basic & clinical pharmacology & toxicology.

Cardiovascular drugs and erectile dysfunction - a symmetry analysis.

Jesper Hallas, J. Hallas, A. Pottegård, 2015, British journal of clinical pharmacology.

Challenges in classification of astma sevirity form priescription data

Jesper Rømhild Davidsen, Jens Søndergaard, Jesper Hallas, 2009 .

Use of N-nitrosodimethylamine (NDMA) contaminated valsartan products and risk of cancer: Danish nationwide cohort study

Jesper Hallas, J. Hallas, A. Pottegård, 2018, British Medical Journal.

Statins and nonsteroidal anti‐inflammatory drugs—an analysis of prescription symmetry

Jesper Hallas, Max Petzold, Cecilia Stålsby Lundborg, 2006, Pharmacoepidemiology and drug safety.

Changing characteristics over time of individuals receiving COVID-19 vaccines in Denmark: A population-based descriptive study of vaccine uptake

P. B. Jensen, J. Hallas, A. Pottegård, 2022, medRxiv.

Post-acute effects of SARS-CoV-2 infection in individuals not requiring hospital admission: a Danish population-based cohort study

Henrik Nielsen, J. Hallas, A. Pottegård, 2021, The Lancet Infectious Diseases.

Diabetes Is Not Associated with the Risk of Rupture Among Patients with Abdominal Aortic Aneurysms - Results From a Large Danish Register Based Matched Case Control Study From 1996 to 2016.

J. Hallas, J. Lindholt, L. Rasmussen, 2020, European journal of vascular and endovascular surgery : the official journal of the European Society for Vascular Surgery.

Randomised trial of telephone counselling to improve participants' adherence to prescribed drugs in a vascular screening trial

J. Hallas, J. Lindholt, L. Frost, 2020, Basic & clinical pharmacology & toxicology.

HIGHLIGHTS d Type of Research : Nested case-control study of a nationwide

J. Hallas, A. Pottegård, J. Lindholt, 2017 .

Long-term Use of Statins and Risk of Renal Cell Carcinoma: A Population-based Case-Control Study.

J. Hallas, A. Pottegård, S. Friis, 2016, European urology.

Use of proton-pump inhibitors among adults: a Danish nationwide drug utilization study

J. Hallas, A. Pottegård, A. Lassen, 2016, Therapeutic advances in gastroenterology.

Syddansk Universitet Identification of Associations Between Prescribed Medications and Cancer A Nationwide Screening

J. Gagne, J. Hallas, S. Friis, 2016 .

Antithrombotic drugs and subarachnoid haemorrhage risk

J. Hallas, A. Pottegård, F. Poulsen, 2015, Thrombosis and Haemostasis.

Renin–Angiotensin System Blockers and Adverse Outcomes of Influenza and Pneumonia: A Danish Cohort Study

H. Sørensen, J. Hallas, A. Pottegård, 2020, Journal of the American Heart Association.

Postdiagnosis Statin Use and Mortality in Danish Patients With Prostate Cancer.

H. Sørensen, J. Hallas, M. Nørgaard, 2017, Journal of clinical oncology : official journal of the American Society of Clinical Oncology.

Significance of age and comorbidity on treatment modality, treatment adherence, and prognosis in elderly ovarian cancer patients.

J. Hallas, J. Herrstedt, Merete Paludan, 2012, Gynecologic oncology.

Seven-Day Mortality Can Be Predicted in Medical Patients by Blood Pressure, Age, Respiratory Rate, Loss of Independence, and Peripheral Oxygen Saturation (the PARIS Score): A Prospective Cohort Study with External Validation

J. Hallas, A. Lassen, M. Brabrand, 2015, PloS one.

Are users of lipid-lowering drugs at increased risk of peripheral neuropathy?

J. Hallas, C. Huerta, S. Sindrup, 2001, European Journal of Clinical Pharmacology.

J. Hallas, L. Gram, T. Haghfelt, 1990, Journal of internal medicine.

National surveillance of Helicobacter pylori eradication therapy in Denmark. Results from registration of 34,582 prescriptions.

J. Hallas, P. Funch‐jensen, H. J. Kolmos, 1998, Scandinavian journal of gastroenterology.

Low Use and Adherence to Maintenance Medication in Chronic Obstructive Pulmonary Disease in the General Population

J. Hallas, B. Nordestgaard, J. Vestbo, 2014, Journal of General Internal Medicine.

Epidural analgesia and postoperative complications in colorectal cancer surgery. An observational registry‐based study

J. Hallas, I. Gögenur, R. Hasselager, 2022, Acta anaesthesiologica Scandinavica.

Children's relative age in class and use of medication for ADHD: a Danish Nationwide Study

J. Hallas, A. Pottegård, H. Zoëga, 2014, Journal of child psychology and psychiatry, and allied disciplines.

Long-term cardiovascular safety of febuxostat compared with allopurinol in patients with gout (FAST): a multicentre, prospective, randomised, open-label, non-inferiority trial

T. Cameron Waller, J. McMurray, P. Jhund, 2020, The Lancet.

The relationship between paroxetine and the sparteine oxidation polymorphism

J. Hallas, E. Skjelbo, K. Brøsen, 1992, Clinical pharmacology and therapeutics.

Outcome of revascularisation in stable coronary artery disease without ischaemia: a Danish registry-based follow-up study

S. Hess, J. Hallas, W. Vach, 2017, BMJ Open.

Outcome with invasive versus medical treatment of stable coronary artery disease: influence of perfusion defect size, ischaemia, and ejection fraction.

S. Hess, J. Hallas, W. Vach, 2016, EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology.

CLEP_A_246636 447..455

J. Hallas, J. Frystyk, L. Rasmussen, 2020 .

RE: Gout and sodium‐glucose cotransporter‐2 inhibitors

J. Hallas, D. Henriksen, M. Højlund, 2021, Pharmacoepidemiology and drug safety.

Hormonal contraceptive use and risk of glioma among younger women: a nationwide case-control study.

J. Hallas, S. Friis, B. Kristensen, 2015, British journal of clinical pharmacology.

Hormonal contraceptive use and risk of glioma among younger women : 1 a nationwide case-control study 1 2 Running title : Hormonal contraceptive use and glioma risk 3

J. Hallas, S. Friis, B. Kristensen, 2014 .

Hormone replacement therapy and risk of glioma: a nationwide nested case-control study.

J. Hallas, S. Friis, P. Ravn, 2013, Cancer epidemiology.

Protocol of the Febuxostat versus Allopurinol Streamlined Trial (FAST): a large prospective, randomised, open, blinded endpoint study comparing the cardiovascular safety of allopurinol and febuxostat in the management of symptomatic hyperuricaemia

R. de Caterina, J. McMurray, J. Hallas, 2014, BMJ Open.

SARS-CoV-2 infection and adverse outcomes in users of ACE inhibitors and angiotensin-receptor blockers: a nationwide case-control and cohort analysis

H. Bøtker, H. Sørensen, J. Hallas, 2020, Thorax.

Data Resource Profile: The Danish National Prescription Registry.

H. Sørensen, J. Hallas, A. Pottegård, 2016 .

Association between use of phthalate-containing medication and semen quality among men in couples referred for assisted reproduction

T. Ahern, J. Hallas, A. Pottegård, 2018, Human reproduction.

Clinical events preceding switching and discontinuation of oral anticoagulant treatment in patients with atrial fibrillation

J. Hallas, A. Pottegård, E. Grove, 2016, Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology.

University of Southern Denmark Randomized trial of switching from prescribed non-selective non-steroidal anti-inflammatory drugs to prescribed celecoxib

J. McMurray, J. Hallas, D. Grobbee, 2017 .

Association of Long-term Statin Use With the Risk of Intracerebral Hemorrhage

J. Hallas, L. Goldstein, S. Möller, 2022, Neurology.

Lithium and the risk of chronic kidney disease: A population‐based case–control study

J. Hallas, D. Henriksen, M. Nybo, 2022, Basic & clinical pharmacology & toxicology.

The antiplatelet effect of clopidogrel is not attenuated by statin treatment in stable patients with ischemic heart disease

J. Hallas, S. Kristensen, P. Vinholt, 2005, Thrombosis and Haemostasis.

Syddansk Universitet Use of N-nitrosodimethylamine ( NDMA ) contaminated valsartan products and risk of cancer Danish nationwide cohort study

J. Hallas, A. Pottegård, N. B. Johansen, 2018 .

Use of acid‐suppressive therapy before anti‐reflux surgery in 2922 patients: a nationwide register‐based study in Denmark

J. Hallas, A. Pottegård, P. Bytzer, 2015, Alimentary pharmacology & therapeutics.

Antiepileptic drug utilization: a Danish prescription database analysis

J. Hallas, M. Friis, D. Gaist, 2001, Acta neurologica Scandinavica.

Non-steroidal anti-inflammatory drugs and ulcer complications: a risk factor analysis for clinical decision-making.

J. Hallas, P. Bytzer, J. Lauritsen, 1996, Scandinavian journal of gastroenterology.

The characteristics and prognosis of patients fulfilling the Appropriateness Evaluation Protocol in a medical admission unit; a prospective observational study

J. Hallas, M. Brabrand, T. Knudsen, 2011, BMC health services research.

Use of Antiepileptic Drugs and Risk of Infection in Taiwan and Denmark: A Collaborative Cross-National Sequence Symmetry Analysis

J. Hallas, A. Pottegård, E. Lai, 2013 .

Effect of a Community Screening for Helicobacter pylori: A 5-Yr Follow-Up Study

J. Hallas, J. Hansen, O. S. Muckadell, 2008, The American Journal of Gastroenterology.

Reply to M. Nayan et al.

H. Sørensen, J. Hallas, M. Nørgaard, 2017, Journal of Clinical Oncology.

A new likelihood model for analyses of pharmacoepidemiologic case–control studies which avoids decision rules for determining latent exposure status

J. Hallas, A. Pottegård, H. Støvring, 2020, BMC Medical Research Methodology.

Facing the Issue of Drug Interactions in Elderly Depressed Patients

J. Hallas, L. Gram, J. Rosholm, 1998 .

Using the waiting time distribution with random index dates to estimate prescription durations in the presence of seasonal stockpiling

J. Hallas, A. Pottegård, E. Skovlund, 2020, Pharmacoepidemiology and drug safety.

Validity of ICD‐9 and ICD‐10 codes used to identify acute liver injury: A study in three European data sources

J. Hallas, A. Pottegård, M. Pladevall, 2019, Pharmacoepidemiology and drug safety.

How Well Do Discharge Diagnoses Identify Hospitalised Patients with Community-Acquired Infections? – A Validation Study

J. Hallas, C. Laursen, A. Lassen, 2014, PloS one.

First-trimester exposure to methylphenidate: a population-based cohort study.

J. Hallas, A. Pottegård, L. Aagaard, 2014, The Journal of clinical psychiatry.

Statin use and peripheral nerve function—A prospective follow‐up study

J. Hallas, S. Sindrup, S. Möller, 2020, Basic & clinical pharmacology & toxicology.

Individual-level drug utilization analyses

J. Hallas, A. Pottegård, H. Støvring, 2016 .

Long-Term Risk of Skin Cancer and Lymphoma in Users of Topical Tacrolimus and Pimecrolimus: Final Results from the Extension of the Cohort Study Protopic Joint European Longitudinal Lymphoma and Skin Cancer Evaluation (JOELLE)

K. Rothman, J. Hallas, A. Pottegård, 2021, Clinical epidemiology.

K. Rothman, J. Hallas, A. Pottegård, 2021 .

The Influence of Antidepressants on the Disease Course Among Patients With Crohn’s Disease and Ulcerative Colitis—A Danish Nationwide Register–Based Cohort Study

A. Green, J. Hallas, A. Ersbøll, 2018, Inflammatory bowel diseases.

University of Southern Denmark The Influence of Antidepressants on the Disease Course Among Patients With Crohn's Disease and Ulcerative Colitis-A Danish Nationwide Register-Based Cohort Study

A. Green, J. Hallas, S. Kristensen, 2019 .

Significant association between the use of different proton pump inhibitors and microscopic colitis: a nationwide Danish case‐control study

J. Hallas, A. Pottegård, G. L. Nielsen, 2018, Alimentary pharmacology & therapeutics.

Characteristics of undertreatment in COPD in the general population.

J. Hallas, B. Nordestgaard, J. Vestbo, 2013, Chest.

[Children prefer bottled amoxicillin].

J. Hallas, A. Pottegård, 2010, Ugeskrift for laeger.

Who prescribes drugs to patients: A Danish register‐based study

J. Hallas, A. Pottegård, M. Christensen, 2021, British journal of clinical pharmacology.

First trimester in utero exposure to methylphenidate.

J. Hallas, A. Pottegård, L. Aagaard, 2013, Basic & clinical pharmacology & toxicology.

Changes in the pattern of antidepressant use upon the introduction of the new antidepressants: a prescription database study

J. Hallas, U. Bergman, L. Gram, 1997, European Journal of Clinical Pharmacology.

Neuroleptic drug utilization in out-patients--a prescription database study.

J. Hallas, L. Gram, J. Rosholm, 1993, British journal of clinical pharmacology.

Clopidogrel–Paclitaxel Drug–Drug Interaction: A Pharmacoepidemiologic Study

J. Hallas, A. Pottegård, K. Steffensen, 2017, Clinical pharmacology and therapeutics.

Psychopharmacological treatment patterns prior to a schizophrenia diagnosis: A Danish nationwide study

J. Hallas, L. Petersen, O. Mors, 2022, Schizophrenia Research.

Methimazole and risk of acute pancreatitis.

L. Hegedüs, J. Hallas, L. Folkestad, 2020, The lancet. Diabetes & endocrinology.

Original article: High-dose metoclopramide + lorazepam versus low-dose metoclopramide + lorazepam + dehydrobenzperidol in the treatment of cisplatin-induced nausea and vomiting

J. Hallas, J. Hannibal, J. Herrstedt, 1991 .

Oral anticoagulants in patients with atrial fibrillation at low stroke risk: a multicentre observational study

J. Hallas, A. Pottegård, P. Hjemdahl, 2022, European heart journal.

Risk and course of SARS-CoV-2 infection in patients treated for hypothyroidism and hyperthyroidism

L. Hegedüs, J. Hallas, T. Brix, 2021, The Lancet Diabetes & Endocrinology.

Continued potassium supplementation use following loop diuretic discontinuation in older adults: An evaluation of a prescribing cascade relic

J. Hallas, Steven M. Smith, S. Vouri, 2022, Journal of the American Geriatrics Society.

Association of Prior Intracerebral Hemorrhage With Major Adverse Cardiovascular Events

J. Hallas, R. Al‐Shahi Salman, S. Möller, 2022, JAMA network open.

Non-vitamin K antagonist oral anticoagulants, proton pump inhibitors and gastrointestinal bleeds

J. Hallas, A. Pottegård, P. Hjemdahl, 2021, Heart.

Online tool to create publication ready graphical depictions of longitudinal study design implemented in healthcare databases

J. Hallas, Shirley V. Wang, L. Lund, 2021, Pharmacoepidemiology and drug safety.

Role of NSAID use in inflammatory bowel disease. A 5-year follow-up study

J. Hallas, K. Lauritsen, J. Lauritsen, 2000 .

Treatment Failure of TNF-α Inhibitors in Obese Patients With Inflammatory Bowel Disease-A Cohort Study.

J. Hallas, A. Pottegård, J. Kjeldsen, 2018, Inflammatory bowel diseases.

Proton Pump Inhibitor Use Is Not Strongly Associated With SARS-CoV-2 Related Outcomes: A Nationwide Study and Meta-analysis

J. Hallas, T. Benfield, Andreas Lundh, 2021, Clinical Gastroenterology and Hepatology.

Impact of EMA regulatory label changes on hydroxyzine initiation, discontinuation and switching to other medicines in Denmark, Scotland, England and the Netherlands: An interrupted time series regression analysis

J. Hallas, A. Doney, R. Herings, 2021, Pharmacoepidemiology and drug safety.

Open Research Online Control Yourself: ISPESponsored Guidance in the Application of SelfControlled Study Designs in Pharmacoepidemiology

J. Gagne, J. Hallas, H. Whitaker, 2022 .

Statin use and risk of nonmelanoma skin cancer: a nationwide study in Denmark

J. Hallas, A. Pottegård, S. Friis, 2014, British Journal of Cancer.

Association of Low-Dose Quetiapine and Diabetes

J. Hallas, C. Correll, K. Andersen, 2021, JAMA network open.

Perioperative Tranexamic Acid Treatment and Risk of Cardiovascular Events or Death After Total Hip Arthroplasty: A Population-Based Cohort Study from National Danish Databases

J. Hallas, A. Pottegård, S. Overgaard, 2018, The Journal of bone and joint surgery. American volume.

Characteristics and predictors of hospitalization and death in the first 11 122 cases with a positive RT-PCR test for SARS-CoV-2 in Denmark: a nationwide cohort

H. Sørensen, J. Hallas, A. Pottegård, 2020, medRxiv.

The Danish National Prescription Registry

J. Hallas, H. Toft Sørensen, Helle Wallach Kildemoes, 2011, Scandinavian journal of public health.

J. Hallas, B. Harvald, K. Brøsen, 1992, British journal of clinical pharmacology.

Risk Factors for Hospitalization Due to Community-Acquired Sepsis – A Population-Based Case-Control Study

J. Hallas, A. Pottegård, C. Laursen, 2015, PloS one.

Incidence Rate of Community-Acquired Sepsis Among Hospitalized Acute Medical Patients—A Population-Based Survey*

J. Hallas, C. Laursen, A. Lassen, 2015, Critical care medicine.

Polypharmacy in general practice: differences between practitioners.

J. Hallas, J. Kragstrup, J. Søgaard, 1999, The British journal of general practice : the journal of the Royal College of General Practitioners.

Hydrochlorothiazide use is strongly associated with risk of lip cancer

J. Hallas, A. Pottegård, S. Friis, 2017, Journal of internal medicine.

Trends in utilization of antiepileptic drugs in Denmark

J. Hallas, I. Tsiropoulos, M. Andersen, 2006, Acta neurologica Scandinavica.

A cohort study on the risk of lymphoma and skin cancer in users of topical tacrolimus, pimecrolimus, and corticosteroids (Joint European Longitudinal Lymphoma and Skin Cancer Evaluation – JOELLE study)

K. Rothman, J. Hallas, A. Pottegård, 2018, Clinical epidemiology.

Appendicectomy has no beneficial effect on admission rates in patients with ulcerative colitis

H. Sørensen, J. Hallas, W. Vach, 2004, Gut.

Evaluating the use of prescription sequence symmetry analysis as a pharmacovigilance tool: A scoping review.

J. Hallas, Hemita Bhagwandass, Razanne Oueini, 2021, Research in social & administrative pharmacy : RSAP.

Use of self‐controlled designs in pharmacoepidemiology

J. Hallas, A. Pottegård, J Hallas, 2014, Journal of internal medicine.

Comorbidity and polypharmacy in elderly cancer patients: The significance on treatment outcome and tolerance

J. Hallas, J. Herrstedt, T. Jørgensen, 2010 .

Cox regression using a calendar time scale was unbiased in simulations of COVID-19 vaccine effectiveness & safety

J. Hallas, A. Pottegård, H. Støvring, 2023, Journal of Clinical Epidemiology.

Abstract

J. Gagne, J. Hallas, H. Whitaker, 2003, Veterinary Record.

Association of Antithrombotic Drug Use With Subdural Hematoma Risk

J. Hallas, A. Pottegård, F. Poulsen, 2017, JAMA.

Antidepressant drug use and subdural hematoma risk

J. Hallas, A. Pottegård, F. Poulsen, 2020, Journal of thrombosis and haemostasis : JTH.

Use of fluroquinolone and risk of Achilles tendon rupture: a population-based cohort study

J. Hallas, A. Lassen, N. Obel, 2007, European Journal of Clinical Pharmacology.

The Nordic prescription databases as a resource for pharmacoepidemiological research—a literature review

K Furu, U Bergman, J. Hallas, 2013, Pharmacoepidemiology and drug safety.

Drug utilization statistics for individual‐level pharmacy dispensing data

J. Hallas, 2005, Pharmacoepidemiology and drug safety.

Inhalation or total intravenous anaesthesia and recurrence after colorectal cancer surgery: a propensity score matched Danish registry-based study.

J. Hallas, I. Gögenur, R. Hasselager, 2020, British journal of anaesthesia.

Risk of cervical cancer in women with autoimmune diseases, in relation with their use of immunosuppressants and screening: Population‐based cohort study

J. Hallas, E. Lynge, M. Rebolj, 2015, International journal of cancer.

Arterial events, venous thromboembolism, thrombocytopenia, and bleeding after vaccination with Oxford-AstraZeneca ChAdOx1-S in Denmark and Norway: population based cohort study

H. Sørensen, J. Hallas, A. Pottegård, 2021, BMJ.

Congenital Malformations in Denmark: Considerations for the Use of Danish Health Care Registries

J. Hallas, A. Pottegård, P. Damkier, 2020, Clinical epidemiology.

Helicobacter pylori and risk of ulcer bleeding among users of nonsteroidal anti-inflammatory drugs: a case-control study.

J. Hallas, K. Krogfelt, K. Lauritsen, 1999, Gastroenterology.

Adverse Outcomes and Mortality in Users of Non-Steroidal Anti-Inflammatory Drugs tested positive for SARS-CoV-2: A Danish Nationwide Cohort Study

J. Hallas, A. Pottegård, H. Støvring, 2020, medRxiv.

Comorbidity in elderly cancer patients in relation to overall and cancer-specific mortality

J. Hallas, S. Friis, J. Herrstedt, 2012, British Journal of Cancer.

Discontinuation of oral anticoagulation in atrial fibrillation and risk of ischaemic stroke

J. Hallas, Y. Balabanova, G. Brobert, 2020, Heart.

Treatment Changes among Users of Non‐Vitamin K Antagonist Oral Anticoagulants in Atrial Fibrillation

J. Hallas, A. Pottegård, E. Grove, 2017, Basic & clinical pharmacology & toxicology.

Statins and risk of polyneuropathy: A case-control study

J. Hallas, S. Sindrup, L. G. García Rodríguez, 2002, Neurology.

Outcome postponement as a potential patient centred measure of therapeutic benefit: examples in cardiovascular medicine

J. Hallas, P. Ennezat, T. L. Le Jemtel, 2018, Acta cardiologica.

Mortality rate in type 2 myocardial infarction: observations from an unselected hospital cohort.

J. Hallas, K. Thygesen, O. Gerke, 2014, The American journal of medicine.

Classification of myocardial infarction: frequency and features of type 2 myocardial infarction.

J. Hallas, K. Thygesen, T. Larsen, 2013, The American journal of medicine.

A review of the Ghana National Health Insurance Scheme claims database: possibilities and limits for drug utilization research

J. Hallas, F. Asenso-Boadi, M. Donneyong, 2018, Basic & clinical pharmacology & toxicology.

Selective serotonin reuptake inhibitors and the risk of restless legs syndrome: a symmetry analysis

J. Hallas, D. Henriksen, M. Christensen, 2020, European Journal of Clinical Pharmacology.

The excess long-term mortality in peptic ulcer bleeding is explained by nonspecific comorbidity

J. Hallas, S. Laursen, O. B. Schaffalitzky de Muckadell, 2015, Scandinavian journal of gastroenterology.

Use of sildenafil or other phosphodiesterase inhibitors and risk of melanoma

H. Sørensen, J. Hallas, A. Pottegård, 2016, British Journal of Cancer.

Risk of Renal Cell Carcinoma Associated with Calcium Channel Blockers

J. Gagne, J. Hallas, A. Pottegård, 2020, Epidemiology.

Polypharmacy and the risk of drug-drug interactions among Danish elderly. A prescription database study.

J. Hallas, L. Gram, L. Bjerrum, 1998, Danish medical bulletin.

Cancer patients’ first treatment episode with opioids: a pharmaco-epidemiological perspective

J. Hallas, J. Kragstrup, M. Andersen, 2006, Supportive Care in Cancer.

The DanCavas Pilot Study of Multifaceted Screening for Subclinical Cardiovascular Disease in Men and Women Aged 65-74 Years.

J. Hallas, M. Olsen, J. Lindholt, 2017, European journal of vascular and endovascular surgery : the official journal of the European Society for Vascular Surgery.

The Danish Cardiovascular Screening Trial (DANCAVAS): study protocol for a randomized controlled trial

J. Hallas, M. Olsen, J. Lindholt, 2015, Trials.

Use of low‐dose quetiapine increases the risk of major adverse cardiovascular events: results from a nationwide active comparator‐controlled cohort study

J. Hallas, C. Correll, K. Andersen, 2022, World psychiatry : official journal of the World Psychiatric Association.

Risk scoring systems for adults admitted to the emergency department: a systematic review

Jesper Hallas, Mikkel Brabrand, J. Hallas, 2010, Scandinavian journal of trauma, resuscitation and emergency medicine.

Is overuse of sumatriptan a problem? A population-based study

J. Hallas, S. Sindrup, L. Gram, 1996, European Journal of Clinical Pharmacology.

Hypokalemia in acute medical patients: risk factors and prognosis.

J. Hallas, A. Lassen, P. Vinholt, 2015, The American journal of medicine.

Use of antibiotics in childhood and risk of Type 1 diabetes: a population‐based case–control study

J. Hallas, A. Pottegård, M. Frost, 2017, Diabetic medicine : a journal of the British Diabetic Association.

The effect of low-dose spironolactone on resistant hypertension.

J. Hallas, I. Jacobsen, M. Engbaek, 2010, Journal of the American Society of Hypertension : JASH.

Spironolactone use and the risk of upper gastrointestinal bleeding: a population-based case-control study.

J. Hallas, A. Lassen, C. Aalykke, 2008, British journal of clinical pharmacology.

Long term use of drugs affecting the renin-angiotensin system and the risk of cancer: a population-based case-control study.

J. Hallas, S. Friis, R. Christensen, 2012, British journal of clinical pharmacology.

Association of Nonsteroidal Anti-inflammatory Drug Use and Adverse Outcomes Among Patients Hospitalized With Influenza

H. Sørensen, J. Hallas, A. Pottegård, 2020, JAMA network open.

Considerations for Pharmacoepidemiological Studies of Drug-Cancer Associations.

J. Hallas, A. Pottegård, S. Friis, 2018, Basic & Clinical Pharmacology & Toxicology.

Phthalate exposure from drugs during pregnancy and possible risk of preterm birth and small for gestational age.

T. Ahern, J. Hallas, A. Pottegård, 2019, European journal of obstetrics, gynecology, and reproductive biology.

Clinical Pharmacology in Denmark in 2016 - 40 Years with the Danish Society of Clinical Pharmacology and 20 Years as a Medical Speciality.

J. Hallas, G. Jürgens, H. Poulsen, 2016, Basic & clinical pharmacology & toxicology.

Minimizing misclassification of hormone users at mammography screening

J. Hallas, E. Lynge, S. Njor, 2009, International journal of cancer.

Use of Dicloxacillin and Risk of Pregnancy among Users of Oral Contraceptives

J. Hallas, A. Pottegård, K. Brøsen, 2018, Basic & clinical pharmacology & toxicology.

Association of aortic valve calcification and vitamin K antagonist treatment.

J. Hallas, J. Lindholt, G. Urbonaviciene, 2020, European heart journal cardiovascular Imaging.

Use of SSRIs among Danish children: a nationwide study

J. Hallas, A. Pottegård, P. Damkier, 2014, European Child & Adolescent Psychiatry.

Drug prescribing among Danish children: a population-based study

J. Hallas, M. Andersen, Hanne Madsen, 2001, European Journal of Clinical Pharmacology.

Medication errors in pediatric inpatients: a study based on a national mandatory reporting system

J. Hallas, H. Christesen, A. B. Almarsdóttir, 2017, European Journal of Pediatrics.

Postmenopausal hormone therapy and mortality before and after the Women’s Health Initiative study

J. Hallas, K. Christensen, M. Osler, 2023, Scientific Reports.

Impact of low‐dose quetiapine‐use on glycosylated hemoglobin, triglyceride and cholesterol levels

J. Hallas, C. Correll, H. Støvring, 2022, Acta psychiatrica Scandinavica.

Free‐of‐charge dispensing of antipsychotics for schizophrenia in Denmark: Impact on the nationwide prescription registry and redemption of somatic medications

J. Hallas, C. Gasse, M. Højlund, 2022, Basic & clinical pharmacology & toxicology.

Epidural Analgesia and Recurrence after Colorectal Cancer Surgery: A Danish Retrospective Registry-based Cohort Study

J. Hallas, I. Gögenur, R. Hasselager, 2022, Anesthesiology.

Trends in Incidence of Intracerebral Hemorrhage and Association With Antithrombotic Drug Use in Denmark, 2005-2018

J. Hallas, A. Pottegård, R. Salman, 2021, JAMA network open.

Use of phthalate-containing prescription drugs and the risk of gastric cancer: a Danish nationwide case-control study

J. Hallas, A. Pottegård, P. Damkier, 2019, Acta oncologica.

Adherence to Prescribed Drugs Among 65-74 Year Old Men Diagnosed with Abdominal Aortic Aneurysm or Peripheral Arterial Disease in a Screening Trial: A VIVA Substudy.

J. Hallas, J. Lindholt, L. Frost, 2019, European journal of vascular and endovascular surgery : the official journal of the European Society for Vascular Surgery.

Exposure to phthalate‐containing prescription drugs and the risk of colorectal adenocarcinoma: A Danish nationwide case‐control study

T. Ahern, J. Hallas, A. Pottegård, 2019, Pharmacoepidemiology and drug safety.

Antihistamine use and risk of ovarian cancer: A population-based case-control study.

J. Hallas, A. Pottegård, S. Friis, 2019, Maturitas.

Conization and healthcare use: a population-based register study

J. Hallas, P. T. Jensen, E. Lynge, 2017, European journal of cancer prevention : the official journal of the European Cancer Prevention Organisation.

University of Southern Denmark Phthalate exposure from drugs during pregnancy and possible risk of preterm birth and small for gestational age Broe,

J. Hallas, A. Pottegård, R. Lamont, 2019 .

University of Southern Denmark Use of phthalate-containing prescription drugs and the risk of gastric cancer a Danish nationwide case-control study

T. Ahern, J. Hallas, A. Pottegård, 2019 .

The PARIS score can reliably predict 7-day all-cause mortality for both acute medical and surgical patients: an international validation study

J. Hallas, C. Graham, J. Kellett, 2018, QJM : monthly journal of the Association of Physicians.

External validity of a cardiovascular screening including a coronary artery calcium examination in middle-aged individuals from the general population

J. Hallas, M. Olsen, A. Diederichsen, 2018, European journal of preventive cardiology.

Explaining trends in coronary heart disease mortality in different socioeconomic groups in Denmark 1991-2007 using the IMPACTSEC model

J. Hallas, S. Capewell, P. Bandosz, 2018, PloS one.

Using the Symmetry Analysis Design to Screen for Adverse Effects of Non-vitamin K Antagonist Oral Anticoagulants

J. Hallas, A. Pottegård, M. Hellfritzsch, 2018, Drug Safety.

Intermediate-term and long-term mortality among acute medical patients hospitalized with community-acquired sepsis: a population-based study

J. Hallas, A. Pottegård, C. Laursen, 2017, European journal of emergency medicine : official journal of the European Society for Emergency Medicine.

External adjustment of unmeasured confounders in a case–control study of benzodiazepine use and cancer risk

J. Hallas, A. Pottegård, S. Friis, 2017, British journal of clinical pharmacology.

Performance of the High‐dimensional Propensity Score in a Nordic Healthcare Model

J. Hallas, A. Pottegård, 2017, Basic & clinical pharmacology & toxicology.

Reduced ability to work both before and after infectious spondylodiscitis in working-age patients

J. Hallas, A. Lassen, C. Pedersen, 2017, Infectious diseases.

Drug use among complete responders, partial responders and non‐responders in a longitudinal survey of nonagenarians: analysis of prescription register data

J. Hallas, A. Pottegård, K. Christensen, 2017, Pharmacoepidemiology and drug safety.

Persistent User Bias in Case-Crossover Studies in Pharmacoepidemiology.

J. Gagne, S. Schneeweiss, J. Hallas, 2016, American journal of epidemiology.

Early Discontinuation of Metformin in Individuals Treated with Inhibitors of Transporters of Metformin

J. Gagne, J. Hallas, A. Pottegård, 2016, Basic & clinical pharmacology & toxicology.

Identification of Associations Between Prescribed Medications and Cancer: A Nationwide Screening Study

J. Gagne, J. Hallas, A. Pottegård, 2016, EBioMedicine.

Long-term use of lithium and risk of colorectal adenocarcinoma: a nationwide case–control study

J. Hallas, A. Pottegård, S. Friis, 2016, British Journal of Cancer.

Comparison of the Five Danish Regions Regarding Demographic Characteristics, Healthcare Utilization, and Medication Use—A Descriptive Cross-Sectional Study

J. Hallas, A. Pottegård, D. Henriksen, 2015, PloS one.

Abnormal cervical cytology and health care use: a population-based register study.

Miguel Vazquez-Prada Baillet, J. Hallas, P. T. Jensen, 2015, Gynecologic oncology.

Use of Antibiotics and Risk of Type 2 Diabetes: A Population-Based Case-Control Study.

J. Hallas, A. Pottegård, M. Frost, 2015, The Journal of clinical endocrinology and metabolism.

Time to initial antibiotic administration, and short-term mortality among patients admitted with community-acquired severe infections with and without the presence of systemic inflammatory response syndrome: a follow-up study

J. Hallas, C. Laursen, A. Lassen, 2015, Emergency Medicine Journal.

Bacteremia is associated with excess long-term mortality: a 12-year population-based cohort study.

J. Hallas, K. Gradel, H. J. Kolmos, 2015, The Journal of infection.

Pharmacoepidemiological assessment of drug interactions with vitamin K antagonists

J. Gagne, J. Hallas, A. Pottegård, 2014, Pharmacoepidemiology and drug safety.

Long-term use of metformin and colorectal cancer risk in type II diabetics: a population-based case–control study

J. Hallas, A. Pottegård, T. Jørgensen, 2014, Cancer medicine.

Nurses and Physicians in a Medical Admission Unit Can Accurately Predict Mortality of Acutely Admitted Patients: A Prospective Cohort Study

Jesper Hallas, Mikkel Brabrand, J. Hallas, 2014, PloS one.

Potential of prescription registries to capture individual-level use of aspirin and other nonsteroidal anti-inflammatory drugs in Denmark: trends in utilization 1999–2012

J. Hallas, S. Friis, M. Schmidt, 2014, Clinical epidemiology.

Use of disulfiram and risk of cancer: a population-based case–control study

J. Hallas, A. Pottegård, S. Friis, 2014, European journal of cancer prevention : the official journal of the European Cancer Prevention Organisation.

The influence of hospital drug formulary policies on the prescribing patterns of proton pump inhibitors in primary care

J. Hallas, M. Larsen, M. Schou, 2014, European Journal of Clinical Pharmacology.

Primary non-adherence in general practice: a Danish register study

J. Hallas, A. Pottegård, R. Christensen, 2014, European Journal of Clinical Pharmacology.

Myasthenia and risk of cancer: a population‐based case–control study

J. Hallas, A. Pottegård, S. Friis, 2014, European journal of neurology.

Risk of non‐melanoma skin cancer in myasthenia patients treated with azathioprine

J. Hallas, A. Pottegård, S. Friis, 2014, European journal of neurology.

The influence of comprehensive geriatric assessment on drug therapy in elderly patients

J. Hallas, M. Larsen, J. Rosholm, 2014, European Journal of Clinical Pharmacology.

Hospital Physicians' Influence on Gastrointestinal Protection during Treatment with Non-Steroidal Anti-Inflammatory Drugs and Acetylsalicylic Acid and the Impact on Prescribing in Primary Care

J. Hallas, M. Larsen, 2013, PloS one.

Cancer risk in long‐term users of vitamin K antagonists: A population‐based case–control study

J. Hallas, A. Pottegård, S. Friis, 2013, International journal of cancer.

Use of azathioprine for non‐thymoma myasthenia and risk of cancer: a nationwide case–control study in Denmark

J. Hallas, A. Pottegård, S. Friis, 2013, European journal of neurology.

Late‐onset myasthenia not on the increase: a nationwide register study in Denmark, 1996–2009

J. Hallas, D. Gaist, E. Pedersen, 2013, European journal of neurology.

Use of statins and risk of glioma: a nationwide case–control study in Denmark

J. Hallas, S. Friis, D. Gaist, 2013, British Journal of Cancer.

Polypharmacy and drug use in elderly Danish cancer patients during 1996 to 2006

J. Hallas, S. Friis, J. Herrstedt, 2012 .

High‐dose non‐sedating antihistamines are used insufficiently in chronic urticaria patients treated with omalizumab

J. Hallas, C. Bindslev‐Jensen, D. Henriksen, 2021, Clinical and translational allergy.

Process- and patient-reported outcomes of a multifaceted medication adherence intervention for hypertensive patients in secondary care.

J. Hallas, L. J. Kjeldsen, U. Hedegaard, 2016, Research in social & administrative pharmacy : RSAP.

Identification of Drug–Cancer Associations: A Nationwide Screening Study

J. Hallas, A. Pottegård, S. Friis, 2022, Cancer research communications.

The effect of immunosuppressants on the prognosis of SARS-CoV-2 infection

J. Hallas, A. Pottegård, T. Benfield, 2021, European Respiratory Journal.

Patients' concern about their medicine after a generic switch: a combined cross‐sectional questionnaire and register study

J. Hallas, J. Søndergaard, M. Andersen, 2014, Pharmacoepidemiology and drug safety.

Does Appendectomy Reduce the Risk of Ulcerative Colitis?

H. Sørensen, J. Hallas, D. Gaist, 2004, Epidemiology.

Statin use and exacerbations in individuals with chronic obstructive pulmonary disease

J. Hallas, B. Nordestgaard, J. Vestbo, 2014, Thorax.

Gastro‐esophageal reflux disease and exacerbations in chronic obstructive pulmonary disease

J. Hallas, B. Nordestgaard, J. Vestbo, 2015, Respirology.

Increased risk of major adverse cardiac events following the onset of acute exacerbations of COPD

J. Hallas, A. Pottegård, J. Søndergaard, 2019, Respirology.

Appendectomy and ulcerative colitis. Authors' reply

H. Sørensen, J. Hallas, M. Frisch, 2005 .

Medically treated exacerbations in COPD by GOLD 1-4: A valid, robust, and seemingly low-biased definition.

J. Hallas, B. Nordestgaard, J. Vestbo, 2015, Respiratory medicine.

Multifaceted Intervention Including Motivational Interviewing to Support Medication Adherence after Stroke/Transient Ischemic Attack: A Randomized Trial

J. Hallas, A. Pottegård, S. Bak, 2014, Cerebrovascular Diseases Extra.

Adherence to hospital drug formularies and cost of drugs in hospitals in Denmark

J. Hallas, L. J. Kjeldsen, H. Plet, 2013, European Journal of Clinical Pharmacology.

Prevalence, awareness, and control of arterial hypertension in Denmark.

J. Hallas, I. Jacobsen, C. N. Kronborg, 2009, Journal of the American Society of Hypertension : JASH.

Data Resource Profile: The Danish National Prescription Registry

H. Sørensen, J. Hallas, A. Pottegård, 2016, International journal of epidemiology.

Sodium–glucose cotransporter 2 inhibitors and risk of nephrolithiasis

J. Hallas, A. Pottegård, D. Henriksen, 2021, Diabetologia.

Baseline findings of the population‐based, randomized, multifaceted Danish cardiovascular screening trial (DANCAVAS) of men aged 65–74 years

J. Hallas, M. Olsen, J. Lindholt, 2019, The British journal of surgery.

University of Southern Denmark Baseline findings of the population-based, randomized, multifaceted Danish cardiovascular screening trial (DANCAVAS) of men aged 65-74 years Lindholt,

J. Hallas, K. Egstrup, M. Olsen, 2019 .

Comparative effectiveness of heterologous booster schedules with AZD1222, BNT162b2, or mRNA-1273 vaccines against COVID-19 during omicron predominance in the Nordic countries

J. Starrfelt, J. Hallas, A. Hviid, 2022, medRxiv.

The Validity of Danish Prescription Data to Measure Use of Aspirin and Other Non-Steroidal Anti-Inflammatory Drugs and Quantification of Bias Due to Non-Prescription Drug Use

J. Hallas, A. Pottegård, S. Friis, 2021, Clinical epidemiology.

Control yourself: ISPE‐endorsed guidance in the application of self‐controlled study designs in pharmacoepidemiology

J. Gagne, J. Hallas, H. Whitaker, 2021, Pharmacoepidemiology and drug safety.

Improving Medication Adherence in Patients with Hypertension: A Randomized Trial.

J. Hallas, A. Pottegård, J. Henriksen, 2015, The American journal of medicine.

Effects of Community Screening for Helicobacter pylori: 13‐Year Follow‐Up Evaluation of a Randomized Controlled Trial

J. Hallas, O. B. Schaffalitzky de Muckadell, J. Hansen, 2017, Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association.

Sodium‐glucose cotransporter‐2 inhibitors and the risk of gout: A Danish population based cohort study and symmetry analysis

J. Hallas, D. Henriksen, M. Højlund, 2021, Pharmacoepidemiology and drug safety.

Randomized trial of switching from prescribed non-selective non-steroidal anti-inflammatory drugs to prescribed celecoxib: the Standard care vs. Celecoxib Outcome Trial (SCOT)

J. McMurray, J. Hallas, D. Grobbee, 2016, European heart journal.

Ischemic Stroke and Systemic Embolism in Warfarin Users With Atrial Fibrillation or Heart Valve Replacement Exposed to Dicloxacillin or Flucloxacillin

P. B. Jensen, J. Hallas, A. Pottegård, 2020, Clinical pharmacology and therapeutics.

Ophthalmic nepafenac use in the Netherlands and Denmark

J. Hallas, A. Pottegård, A. Margulis, 2017, Acta ophthalmologica.

Use of a Prescribed Ephedrine/Caffeine Combination and the Risk of Serious Cardiovascular Events: A Registry-based Case-Crossover Study

J. Hallas, H. Støvring, M. Andersen, 2008, American journal of epidemiology.

Polypharmacy: correlations with sex, age and drug regimen A prescription database study

J. Hallas, J. Kragstrup, J. Søgaard, 1998, European Journal of Clinical Pharmacology.

Feasibility Study of Advanced Cardiovascular Screening in Middle-Aged Patients with Diabetes

J. Hallas, J. Frystyk, J. Lindholt, 2020, Clinical epidemiology.

Postponement of cardiovascular outcomes by statin use: A systematic review and meta‐analysis of randomized clinical trials

A. Hrõbjartsson, J. Hallas, A. Pottegård, 2020, Basic & clinical pharmacology & toxicology.

Drug related hospital admissions

J. Hallas, J. Schou, B. Harvald, 1993, European Journal of Clinical Pharmacology.

Where to begin? Thirty must‐read papers for newcomers to pharmacoepidemiology

J. Hallas, A. Pottegård, L. Morin, 2021, Pharmacoepidemiology and drug safety.

Use of dipeptidyl peptidase‐4 inhibitors and risk of splanchnic vein thrombosis: A Danish nationwide new‐user active comparator cohort study

J. Hallas, A. Pottegård, L. Folkestad, 2020, Diabetes, obesity & metabolism.

Effect of an In-Hospital Multifaceted Clinical Pharmacist Intervention on the Risk of Readmission: A Randomized Clinical Trial

J. Hallas, A. Pottegård, M. R. Hansen, 2018, JAMA internal medicine.

Fluoroquinolones as a trigger for rupture of abdominal aortic aneurysm: A case‐crossover analysis

J. Hallas, J. Lindholt, Katrine Lawaetz Kristensen, 2021, Basic & clinical pharmacology & toxicology.

Use of self-controlled designs in pharmacoepidemiology Running head : Self-controlled designs

J. Hallas, A. Pottegård, 2014 .

Drugs and femoral neck fracture: a case‐control study

J. Hallas, J. Jensen, L. Gram, 1991, Journal of internal medicine.

Use of prescription drugs among women diagnosed with epithelial ovarian cancer in Denmark

J. Hallas, A. Pottegård, S. Friis, 2018, Acta obstetricia et gynecologica Scandinavica.

Retinoids are not linked to risk of multiple sclerosis: A Danish nationwide cohort study

J. Hallas, F. Paul, N. Nielsen, 2021, European journal of neurology.

Drug‐induced symptoms of functional dyspepsia and nausea. A symmetry analysis of one million prescriptions

J. Hallas, P. Bytzer, P Bytzer, 2000, Alimentary pharmacology & therapeutics.

Conducting pharmacoepidemiologic research in Denmark

J. Hallas, 2001, Pharmacoepidemiology and drug safety.

Associations of low-dose aspirin or other NSAID use with prostate cancer risk in the Danish Diet, Cancer and Health Study

A. Tjønneland, J. Hallas, A. Pottegård, 2019, Cancer Causes & Control.

Prophylactic anticoagulation with low molecular weight heparin in COVID-19: cohort studies in Denmark and Sweden

J. Hallas, A. Pottegård, E. Jimenez‐Solem, 2022, Clinical Microbiology and Infection.

The Use of active Comparators in self-controlled Designs.

N. Pratt, J. Hallas, H. Whitaker, 2021, American journal of epidemiology.

Impact of Lifestyle and Socioeconomic Position on the Association Between Non-steroidal Anti-inflammatory Drug Use and Major Adverse Cardiovascular Events: A Case-Crossover Study

J. Hallas, T. Lash, L. Pedersen, 2023, Drug Safety.

Antihistamines and ovarian cancer survival: nationwide cohort study and in vitro cell viability assay.

J. Hallas, A. Pottegård, S. Friis, 2019, Journal of the National Cancer Institute.

A model to predict the risk of aspirin/non‐steroidal anti‐inflammatory drugs‐related upper gastrointestinal bleeding for the individual patient

J. Hallas, O. S. Muckadell, J. Petersen, 2019, Basic & clinical pharmacology & toxicology.

OP-JNCI190233 1..4

J. Hallas, A. Pottegård, S. Friis, 2020 .

Major Cardiovascular Events After Spontaneous Intracerebral Hemorrhage by Hematoma Location

J. Hallas, R. Al‐Shahi Salman, M. Selim, 2023, JAMA network open.

Association Between Statin Use and Intracerebral Hemorrhage Location

J. Hallas, L. Goldstein, R. Al‐Shahi Salman, 2022, Neurology.

The Validity of Intracerebral Hemorrhage Diagnoses in the Danish Patient Registry and the Danish Stroke Registry

J. Hallas, R. Al‐Shahi Salman, L. G. García Rodríguez, 2020, Clinical epidemiology.

Cost‐consequence analysis evaluating multifaceted clinical pharmacist intervention targeting patient transitions of care from hospital to primary care

J. Hallas, A. Pottegård, K. Kidholm, 2018, Journal of the American College of Clinical Pharmacy.

Drug and Therapeutics Committees in Danish Hospitals: A Survey of Organization, Activities and Drug Selection Procedures

J. Hallas, L. J. Kjeldsen, H. Plet, 2013, Basic & clinical pharmacology & toxicology.

Trends in the use of oral anticoagulants, antiplatelets and statins in four European countries: a population-based study

J. Hallas, F. Valent, F. D. de Abajo, 2021, European journal of clinical pharmacology.

Annotations and Reflections

J. Hallas, A. Pottegård, P. Damkier, 2015, Basic & clinical pharmacology & toxicology.

Patterns of use of antimuscarinic drugs to treat overactive bladder in Denmark, Sweden, and the United Kingdom

J. Hallas, A. Pottegård, S. Bahmanyar, 2016, PloS one.

Statins and polyneuropathy revisited: case‐control study in Denmark, 1999–2013

J. Hallas, S. Sindrup, L. G. García Rodríguez, 2017, British journal of clinical pharmacology.

Antidepressant use in Denmark, Germany, Spain, and Sweden between 2009 and 2014: Incidence and comorbidities of antidepressant initiators.

J. Hallas, A. Pottegård, M. Pladevall, 2019, Journal of affective disorders.

[Danish drug consumption trends].

H. K. Madsen, J. Hallas, 2009, Ugeskrift for laeger.

Cardiovascular drugs and the risk of suicide: a nested case-control study

J. Hallas, T. Callréus, M. Andersen, 2007, European Journal of Clinical Pharmacology.

Identifying admitted patients at risk of dying: a prospective observational validation of four biochemical scoring systems

J. Hallas, M. Brabrand, T. Knudsen, 2013, BMJ Open.

Identifying diabetogenic drugs using real world health care databases: A Danish and Australian symmetry analysis

N. Pratt, J. Hallas, A. Pottegård, 2023, Diabetes, obesity & metabolism.

Screening for drug related dyspepsia: an analysis of prescription symmetry

J. Hallas, P. Bytzer, 1998, European journal of gastroenterology & hepatology.

SearCh for humourIstic and Extravagant acroNyms and Thoroughly Inappropriate names For Important Clinical trials (SCIENTIFIC): qualitative and quantitative systematic study

J. Hallas, A. Pottegård, A. B. Almarsdóttir, 2014, BMJ : British Medical Journal.

Increased use of inhaled corticosteroids among young Danish adult asthmatics: an observational study.

J. Hallas, J. Søndergaard, J. Davidsen, 2010, Respiratory medicine.

Type of hormone therapy and risk of misclassification at mammography screening

J. Hallas, E. Lynge, S. Njor, 2010, Menopause.

Dynamics in diagnoses and pharmacotherapy before and after diagnosing idiopathic pulmonary fibrosis

J. Hallas, C. Laursen, J. Davidsen, 2020, ERJ Open Research.

Do educational meetings and group detailing change adherence to drug formularies in hospitals? A cluster randomized controlled trial

J. Hallas, R. Christensen, L. J. Kjeldsen, 2014, European Journal of Clinical Pharmacology.

Long term use of drugs affecting the renin-angiotensin system and the risk of cancer: a

J. Hallas, S. Friis, R. Christensen, 2012 .

Use of sumatriptan in Denmark in 1994-5: an epidemiological analysis of nationwide prescription data.

J. Hallas, M. Andersen, L. Gram, 1997, British journal of clinical pharmacology.

Use of antipsychotics in Denmark 1997–2018: a nation-wide drug utilisation study with focus on off-label use and associated diagnoses

J. Hallas, C. Correll, K. Andersen, 2021, Epidemiology and Psychiatric Sciences.

Existing Data Sources in Clinical Epidemiology: The Danish COVID-19 Cohort

H. Sørensen, J. Hallas, A. Pottegård, 2020, Clinical epidemiology.

Measures of ‘exposure needed for one additional patient to be harmed’ in population‐based case‐control studies

J. Hallas, A. Pottegård, T. Stürmer, 2014, Pharmacoepidemiology and drug safety.

Reproducibility of real-world evidence studies using clinical practice data to inform regulatory and coverage decisions

Robert W. Platt, James R. Rogers, T. Brennan, 2022, Nature Communications.

Effectiveness and safety of direct oral anticoagulants in atrial fibrillation patients switched from vitamin K antagonists: A systematic review and meta‐analysis

J. Hallas, A. Pottegård, E. Grove, 2019, Basic & clinical pharmacology & toxicology.

Use of chlorprothixene and the risk of diabetes and major adverse cardiovascular events: A nationwide cohort study

J. Hallas, A. Fink-Jensen, K. Andersen, 2022, Basic & clinical pharmacology & toxicology.

Cumulative exposure to phthalates from phthalate‐containing drug products: a Danish population‐wide study

T. Ahern, J. Hallas, A. Pottegård, 2018, British journal of clinical pharmacology.

Prescription of antidepressants is increased in Danish patients with polycystic ovary syndrome and is associated with hyperandrogenism. A population‐based cohort study

J. Hallas, D. Glintborg, M. Andersen, 2014, Clinical Endocrinology.

Evaluating signals generated in a large-scale sequence symmetry analyses: macrolides and heart failure; and NSAIDs and pneumonia

J. Gagne, S. Schneeweiss, J. Hallas, 2020, medRxiv.

Using the Case-crossover Design to Assess Short-term Risks of Bleeding and Arterial Thromboembolism Following Switching Between Oral Anticoagulants in a Population-based Cohort of Atrial Fibrillation Patients.

J. Gagne, J. Hallas, A. Pottegård, 2020, American journal of epidemiology.

Use of benzodiazepines and benzodiazepine‐related drugs in the Nordic countries between 2000 and 2020

J. Hallas, A. Pottegård, J. Wastesson, 2022, Basic & clinical pharmacology & toxicology.

Differences in the consumption rates and regulatory barriers to the accessibility of strong opioid analgesics in Israel and St. Petersburg

J. Hallas, D. Gaist, S. Bak, 2011, European Journal of Clinical Pharmacology.

The International Society for Pharmacoepidemiology's Comments on the Core Recommendations in the Summary of the Heads of Medicines Agencies (HMA) ‐ EMA Joint Big Data Task Force

K. Huybrechts, S. Schneeweiss, A. Bate, 2019, Pharmacoepidemiology and drug safety.

Polypharmacy in elderly cancer patients.

J. Hallas, J. Herrstedt, T. Jørgensen, 2010 .

Impact of socioeconomic status on the use of inhaled corticosteroids in young adult asthmatics.

J. Hallas, J. Søndergaard, J. Davidsen, 2011, Respiratory medicine.

Potential of prescription registries to capture individual-level use of aspirin and other nonsteroidal anti-inflammatory drugs in Denmark: trends in utilization 1999–2012

J. Hallas, S. Friis, M. Schmidt, 2014, Clinical epidemiology.

Comparative effectiveness of heterologous third dose vaccine schedules against severe covid-19 during omicron predominance in Nordic countries: population based cohort analyses

J. Starrfelt, J. Hallas, R. Ljung, 2023, BMJ.

Sampling in the case‐time‐control design among drug users when outcome prevents further treatment

J. Hallas, T. Scheike, T. Delvin, 2022, Pharmacoepidemiology and drug safety.

Identifying signals of interest when screening for drug‐outcome associations in health care data

J. Gagne, J. Hallas, A. Pottegård, 2018, British journal of clinical pharmacology.

Original Contribution Using the Case-Crossover Design to Assess Short-Term Risks of Bleeding and Arterial Thromboembolism After Switching Between Oral Anticoagulants in a Population-Based Cohort of Patients With Atrial Fibrillation

J. Gagne, J. Hallas, A. Pottegård, 2020 .

Effect of single versus multiple prophylactic antibiotic doses on prosthetic joint infections following primary total hip arthroplasty in patients with osteoarthritis at public and private hospitals in Denmark: protocol for a nationwide cross-over, cluster randomised, non-inferiority trial [The Pro-

J. Hallas, R. Christensen, A. Odgaard, 2023, BMJ open.

Long-term use of antiplatelet drugs by stroke patients: a follow-up study based on prescription register data

J. Hallas, R. Christensen, D. Gaist, 2012, European Journal of Clinical Pharmacology.

Observational Studies

T. Shakespeare, J. Peipert, M. Phipps, 2003 .

High-dose metoclopramide + lorazepam versus low-dose metoclopramide + lorazepam + dehydrobenzperidol in the treatment of cisplatin-induced nausea and vomiting.

J. Hallas, J. Hannibal, J. Herrstedt, 1991, Annals of oncology : official journal of the European Society for Medical Oncology.

The risk of fragility fractures following initiation of gabapentin and pregabalin—A Danish, nationwide, high‐dimensional propensity score‐matched cohort study

J. Hallas, L. Folkestad, D. Henriksen, 2022, Basic & clinical pharmacology & toxicology.

Cardiovascular risks of continuing vs. initiating NSAIDs after first-time myocardial infarction or heart failure: a nationwide cohort study.

J. Hallas, A. Pottegård, M. Ernst, 2023, European heart journal. Cardiovascular pharmacotherapy.

University of Southern Denmark Characteristics and predictors of hospitalization and death in the first 11 122 cases with a positive RT-PCR test for SARS-CoV-2 in Denmark a nationwide cohort

H. Sørensen, J. Hallas, A. Pottegård, 2020 .

University of Southern Denmark Sodium-glucose cotransporter-2 inhibitors and the risk of gout

J. Hallas, D. Henriksen, M. Højlund, 2021 .

Sixteen years of creatinine measurements among 460 000 individuals—The Funen Laboratory Cohort (FLaC), a population‐based pharmacoepidemiological resource to study drug‐induced kidney disease

J. Hallas, D. Henriksen, M. Nybo, 2018, Basic & clinical pharmacology & toxicology.

Association between gabapentinoids and oedema treated with loop diuretics: A pooled sequence symmetry analysis from the USA and Denmark

J. Hallas, E. Morris, D. Henriksen, 2022, British journal of clinical pharmacology.

Impact of EU regulatory label changes for diclofenac in people with cardiovascular disease in four countries: Interrupted time series regression analysis

J. Hallas, A. Pottegård, A. Doney, 2020, British journal of clinical pharmacology.

Cost‐consequence analysis evaluating multifaceted clinical pharmacist intervention targeting patient transitions of care from hospital to primary care

J. Hallas, A. Pottegård, K. Kidholm, 2018, Journal of the American College of Clinical Pharmacy.

Odense Pharmacoepidemiological Database: A Review of Use and Content.

J. Hallas, A. Pottegård, M. Olesen, 2017, Basic & clinical pharmacology & toxicology.

Patterns of use of antimuscarinic drugs to treat overactive bladder in Denmark, Sweden, and the United Kingdom

J. Hallas, A. Pottegård, S. Bahmanyar, 2016, PloS one.

Treatment with montelukast and antidepressive medication—a symmetry analysis

J. Hallas, D. Henriksen, P. Damkier, 2018, Pharmacoepidemiology and drug safety.

Mortality rate in type 2 myocardial infarction: observations from an unselected hospital cohort.

J. Hallas, K. Thygesen, O. Gerke, 2014, The American journal of medicine.

Selective serotonin reuptake inhibitors and the risk of restless legs syndrome: a symmetry analysis

J. Hallas, D. Henriksen, M. Christensen, 2020, European Journal of Clinical Pharmacology.

Is Shock Index a Valid Predictor of Mortality in Emergency Department Patients With Hypertension, Diabetes, High Age, or Receipt of β- or Calcium Channel Blockers?

J. Hallas, N. Shapiro, A. Lassen, 2016, Annals of emergency medicine.

Considerations for Pharmacoepidemiological Studies of Drug-Cancer Associations.

J. Hallas, A. Pottegård, S. Friis, 2018, Basic & clinical pharmacology & toxicology.

Response to the Letter: "Epidemiologic Association Between Antibiotic Use With the Risk of Developing Type 2 Diabetes" by López-Hernández, D.

J. Hallas, A. Pottegård, M. Frost, 2015, The Journal of clinical endocrinology and metabolism.

The association between diabetes and abdominal aortic aneurysms in men: results of two Danish screening studies, a systematic review, and a meta-analysis of population-based screening studies

J. Hallas, J. Lindholt, G. Urbonaviciene, 2023, BMC Cardiovascular Disorders.

Randomised trial of switching from prescribed non-selective non-steroidal anti-inflammatory drugs to prescribed celecoxib

J. McMurray, J. Hallas, D. Grobbee, 2016 .

Methodology of the brodalumab assessment of hazards: a multicentre observational safety (BRAHMS) study

P. B. Jensen, J. Hallas, G. Trifirò, 2023, BMJ Open.

International Society for Pharmacoepidemiology (ISPE) statement on American Society of Clinical Oncology's new policy for relationships with companies

J. Hallas, J. Acquavella, T. Sturmer, 2014 .

Pharmacovigilance based on prescription databases.

J. Hallas, J Hallas, L E Gram, 2000, Pharmacology & toxicology.

Primary non-adherence in general practice: a Danish register study

J. Hallas, A. Pottegård, R. Christensen, 2014, European Journal of Clinical Pharmacology.

Disproportionality Analysis Used to Identify Patterns in Medication Error Reports Involving Hospitalized Children

J. Hallas, R. Rishoej, Lene Juel Kjeldsen, 2018, Basic & clinical pharmacology & toxicology.

J. Hallas, L. Gram, E. Grodum, 1992, Respiration; international review of thoracic diseases.

Treatment Failure of TNF-α Inhibitors in Obese Patients With Inflammatory Bowel Disease-A Cohort Study.

J. Hallas, A. Pottegård, K. G. Madsen, 2018, Inflammatory bowel diseases.

Data Resource Profile: The Danish National Prescription Registry

H. Sørensen, J. Hallas, A. Pottegård, 2016, International journal of epidemiology.

Long-Term Lithium Use and Risk of Renal and Upper Urinary Tract Cancers.

J. Hallas, A. Pottegård, S. Friis, 2016, Journal of the American Society of Nephrology : JASN.

Use of Antibiotics in Children: A Danish Nationwide Drug Utilization Study

J. Hallas, A. Pottegård, P. Damkier, 2015, The Pediatric infectious disease journal.

Observational Studies

J. Hallas, 2003 .

Hormone Replacement Therapy Increases The Risk Of Cranial Meningioma (P3.325)

J. Hallas, S. Friis, P. Ravn, 2014, Neurology.

Drug and Therapeutics Committees in Danish Hospitals: A Survey of Organization, Activities and Drug Selection Procedures

J. Hallas, L. J. Kjeldsen, H. Plet, 2013, Basic & clinical pharmacology & toxicology.

Association between prescribing patterns of anti-asthmatic drugs and clinically uncontrolled asthma: a cross-sectional study.

J. Hallas, J. Søndergaard, J. Davidsen, 2011, Pulmonary pharmacology & therapeutics.

A study of cancer occurrence in users of mirabegron and antimuscarinic treatments for overactive bladder

J. Hallas, C. Enger, B. Suehs, 2021, Current medical research and opinion.

Reassessing the evidence of a survival advantage in Type 2 diabetes treated with metformin compared with controls without diabetes: a retrospective cohort study.

J. Hallas, M. Thinggaard, L. A. Larsen, 2022, International journal of epidemiology.

Recommendations on the calculation of confidence intervals for sequence symmetry analyses

J. Hallas, L. Lund, 2022, Pharmacoepidemiology and drug safety.

Do statins protect against upper gastrointestinal bleeding?

J. Hallas, A. Lassen, C. Aalykke, 2009, British journal of clinical pharmacology.

Association of Statin Use With Risk of Stroke Recurrence After Intracerebral Hemorrhage

J. Hallas, L. Goldstein, M. Selim, 2023, Neurology.

Antidepressant use in Denmark, Germany, Spain, and Sweden between 2009 and 2014: Incidence and comorbidities of antidepressant initiators.

J. Hallas, A. Pottegård, M. Pladevall, 2019, Journal of affective disorders.

Nurse tele‐consultations with discharged COPD patients reduce early readmissions – an interventional study

J. Hallas, A. Sorknæs, Hanne Madsen, 2011, The clinical respiratory journal.

Development and Validation of a Nordic Multimorbidity Index Based on Hospital Diagnoses and Filled Prescriptions

P. B. Jensen, J. Hallas, A. Pottegård, 2022 .

Sudden Sensorineural Hearing Loss Following Immunization With BNT162b2 or mRNA-1273: A Danish Population-Based Cohort Study.

J. Hallas, B. Cleary, P. Damkier, 2023, Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery.

Bottleneck analysis: Simple prediction of the precision of a planned case–control or cohort study based on healthcare registers

J. Hallas, A. Pottegård, H. Støvring, 2021, Pharmacoepidemiology and drug safety.

Population Exposure to Phthalate‐containing Drugs

T. Ahern, J. Hallas, A. Pottegård, 2017, Basic & clinical pharmacology & toxicology.