Jesper Hallas

Use of self‐controlled designs in pharmacoepidemiology

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

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

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

Drug related admissions to medical wards: a population based survey.

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

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.

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.

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.

Methods for estimating the occurrence of polypharmacy by means of a prescription database

Jesper Hallas, Lars Bjerrum, Jakob Kragstrup, 1997, European Journal of Clinical Pharmacology.

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.

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 use of selective serotonin receptor inhibitors (SSRIs) is not associated with increased risk of endoscopy‐refractory bleeding, rebleeding or mortality in peptic ulcer bleeding

G. Leontiadis, S. Laursen, A. Stanley, 2017, Alimentary pharmacology & therapeutics.

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.

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

J. Gagne, A. Pottegård, Jesper Hallas, 2019 .

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.

An association between selective serotonin reuptake inhibitor use and serious upper gastrointestinal bleeding.

O. B. Schaffalitzky de Muckadell, A. Lassen, M. Dall, 2009, Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association.