L. Ritchie

Aziz Sheikh, Colin R Simpson, Lewis D Ritchie, 2011, The British journal of general practice : the journal of the Royal College of General Practitioners.

Influences on general practitioners' use of pre-hospital thrombolysis: a qualitative study.

Pauline C. Williams, C. Bond, L. Ritchie, 2004, Journal of public health.

Risk Predictors and Symptom Features of Long COVID Within a Broad Primary Care Patient Population Including Both Tested and Untested Patients

I. Pavord, K. Khunti, M. Hyland, 2021, Pragmatic and observational research.

set study exploiting a unique national linked data the community ( SIVE ) : protocol for a cohort Seasonal Influenza Vaccine Effectiveness in

Colin Simpson, A. Sheikh, C. Robertson, 2022 .

Statins and the prevention of coronary heart disease: striking a balance that is desirable, affordable, and achievable.

L. Ritchie, 2000, The British journal of general practice : the journal of the Royal College of General Practitioners.

Informing the public health response to COVID-19 (and lessons learnt for future pandemics): a systematic review of risk factors for disease, severity, and mortality.

Colin Simpson, A. Sheikh, Xin Wang, 2020 .

Impact of deprivation and rural residence on treatment of colorectal and lung cancer

J. Little, J. Cassidy, L. Sharp, 2002, British Journal of Cancer.

Early estimation of pandemic influenza Antiviral and Vaccine Effectiveness (EAVE): use of a unique community and laboratory national data-linked cohort study.

Colin Simpson, A. Sheikh, C. Robertson, 2015, Health technology assessment.

Systematic review of cancer treatment programmes in remote and rural areas

J. Little, J. Cassidy, N. Campbell, 1999, British Journal of Cancer.

Impact on emergency and elective hospital-based care in Scotland over the first 12 months of the pandemic: interrupted time-series analysis of national lockdowns

Colin Simpson, S. Katikireddi, L. Ritchie, 2022, Journal of the Royal Society of Medicine.

COVID-19 in Pregnancy in Scotland (COPS): protocol for an observational study using linked Scottish national data

Colin Simpson, A. Sheikh, C. Robertson, 2020, BMJ Open.

Cardiac rehabilitation in Scotland: is current provision satisfactory?

J. Grimshaw, N. Campbell, L. Ritchie, 1996, Journal of public health medicine.

Response of patients and doctors to the 1983 'pill scare'.

L. Ritchie, M. Berkeley, 1984, The Journal of the Royal College of General Practitioners.

A future career in general practice? A longitudinal study of medical students and pre-registration house officers

Amanda J Lee, L. Ritchie, H. Sinclair, 2006, The European journal of general practice.

Total audit of preventive practices

Michael W. Taylor, L. Ritchie, R. Taylor, 1990, BMJ.

The impact and effectiveness of pneumococcal vaccination in Scotland for those aged 65 and over during winter 2003/2004

Colin Simpson, S. Clarke, C. Robertson, 2008, BMC infectious diseases.

Severity of omicron variant of concern and effectiveness of vaccine boosters against symptomatic disease in Scotland (EAVE II): a national cohort study with nested test-negative design

Colin Simpson, L. Ritchie, C. McCowan, 2022, The Lancet Infectious Diseases.

BNT162b2 and ChAdOx1 nCoV-19 vaccinations, incidence of SARS-CoV-2 infections and COVID-19 hospitalisations in Scotland in the Delta era

Colin Simpson, L. Ritchie, C. McCowan, 2022, Journal of global health.

Risk of COVID-19 hospital admission among children aged 5–17 years with asthma in Scotland: a national incident cohort study

Colin Simpson, S. Katikireddi, L. Ritchie, 2021, The Lancet Respiratory Medicine.

Predicted COVID-19 positive cases, hospitalisations, and deaths associated with the Delta variant of concern, June–July, 2021

Colin Simpson, S. Katikireddi, L. Ritchie, 2021, The Lancet Digital Health.

Cohort profile: Early pandemic evaluation and enhanced surveillance of COVID-19 (EAVE II) database

Colin Simpson, C. Robertson, L. Ritchie, 2021, International journal of epidemiology.

A clinical evaluation of flurbiprofen LAT and piroxicam gel: A multicentre study in general practice

L. Ritchie, 1996, Clinical Rheumatology.

Secondary prevention clinics for coronary heart disease: four year follow up of a randomised controlled trial in primary care

J. Simpson, P. Murchie, A. Lee, 2003, BMJ : British Medical Journal.

James Mackenzie Lecture 2010: Beyond the numbers game--the call of leadership.

L. Ritchie, 2012, The British journal of general practice : the journal of the Royal College of General Practitioners.

Primary and preschool immunisation in Grampian: progress and the 1990 contract.

L. Ritchie, A. Bisset, D. Russell, 1992, BMJ.

New NICE guidelines for hypertension

P. Murchie, L. Ritchie, N. Campbell, 2011, BMJ : British Medical Journal.

General Practice Blood Pressure Recording in Scotland: Variations in the Classification of Hypertension

L. Ritchie, M. Irving, A. Begg, 1996, Scottish medical journal.

Impact of COVID-19 on accident and emergency attendances and emergency and planned hospital admissions in Scotland: an interrupted time-series analysis

Colin Simpson, C. Fischbacher, A. Sheikh, 2020, Journal of the Royal Society of Medicine.

Audit of prehospital thrombolysis by general practitioners in peripheral practices in Grampian

N. Waugh, L. Ritchie, J. Rawles, 1998, Heart.

Severe COVID-19 outcomes after full vaccination of primary schedule and initial boosters: pooled analysis of national prospective cohort studies of 30 million individuals in England, Northern Ireland, Scotland, and Wales

Colin Simpson, S. de Lusignan, S. Katikireddi, 2022, The Lancet.

Vaccine effectiveness of two-dose BNT162b2 against symptomatic and severe COVID-19 among adolescents in Brazil and Scotland over time: a test-negative case-control study

Colin Simpson, G. Werneck, E. Paixão, 2022, The Lancet Infectious Diseases.

Factors influencing general practitioners' referral to hospital of adults with presumed infective diarrhoea.

C. C. Smith, J. Grimshaw, J. Douglas, 1994, The British journal of general practice : the journal of the Royal College of General Practitioners.

Blood pressure recording by general practitioners in north-east Scotland.

L. Ritchie, A. Currie, 1983, British medical journal.

A population-based matched cohort study of early pregnancy outcomes following COVID-19 vaccination and SARS-CoV-2 infection

Colin Simpson, S. Katikireddi, L. Hopcroft, 2022, Nature Communications.

Pregnancy outcomes after SARS-CoV-2 infection in periods dominated by delta and omicron variants in Scotland: a population-based cohort study

Colin Simpson, S. Katikireddi, L. Hopcroft, 2022, The Lancet Respiratory Medicine.

Secondary prevention in coronary heart disease: a randomised trial of nurse led clinics in primary care

L D Ritchie, N. Campbell, L. Ritchie, 1998, Heart.

Association between multimorbidity and mortality in a cohort of patients admitted to hospital with COVID-19 in Scotland

Colin Simpson, A. Azcoaga-Lorenzo, L. Ritchie, 2021, Journal of the Royal Society of Medicine.

Reducing the time before consulting with symptoms of lung cancer: a randomised controlled trial in primary care.

S. Wyke, M. Johnston, M. Nicolson, 2013, The British journal of general practice : the journal of the Royal College of General Practitioners.

Secondary prevention clinics for coronary heart disease: four year follow up of a randomised controlled trial in primary care

J. Simpson, P. Murchie, N. Campbell, 2003, BMJ : British Medical Journal.

Factors influencing time from presentation to treatment of colorectal and breast cancer in urban and rural areas

P. Donnan, A. Munro, J. Cassidy, 2004, British Journal of Cancer.

Interim findings from first-dose mass COVID-19 vaccination roll-out and COVID-19 hospital admissions in Scotland: a national prospective cohort study

Colin Simpson, A. Sheikh, S. de Lusignan, 2021, The Lancet.

First-dose ChAdOx1 and BNT162b2 COVID-19 vaccines and thrombocytopenic, thromboembolic and hemorrhagic events in Scotland

S. de Lusignan, S. Katikireddi, R. Lyons, 2021, Nature Medicine.

Effectiveness of H1N1 vaccine for the prevention of pandemic influenza in Scotland, UK: a retrospective observational cohort study.

Colin Simpson, A. Sheikh, C. Robertson, 2012, The Lancet. Infectious diseases.

Ethnic and social inequalities in COVID-19 outcomes in Scotland: protocol for early pandemic evaluation and enhanced surveillance of COVID-19 (EAVE II)

Colin Simpson, S. Katikireddi, A. Leyland, 2021, BMJ Open.

First dose ChAdOx1 and BNT162b2 COVID-19 vaccinations and cerebral venous sinus thrombosis: A pooled self-controlled case series study of 11.6 million individuals in England, Scotland, and Wales

Colin Simpson, S. de Lusignan, S. Katikireddi, 2022, PLoS medicine.

Early Pandemic Evaluation and Enhanced Surveillance of COVID-19 (EAVE II): protocol for an observational study using linked Scottish national data

Colin Simpson, A. Sheikh, M. Woolhouse, 2020, BMJ Open.

Informing the public health response to COVID-19: a systematic review of risk factors for disease, severity, and mortality

Colin Simpson, A. Sheikh, C. Jackson, 2021, BMC Infectious Diseases.

Effectiveness of influenza vaccination for preventing influenza-related complications in people with asthma: a systematic review protocol

Colin Simpson, A. Sheikh, L. Ritchie, 2016, BMJ Open.

Effectiveness of First Dose of COVID-19 Vaccines Against Hospital Admissions in Scotland: National Prospective Cohort Study of 5.4 Million People

Colin Simpson, A. Sheikh, S. de Lusignan, 2021, SSRN Electronic Journal.

Developing a complex intervention to reduce time to presentation with symptoms of lung cancer.

S. Wyke, M. Johnston, M. Nicolson, 2012, The British journal of general practice : the journal of the Royal College of General Practitioners.

Call to needle times after acute myocardial infarction in urban and rural areas in northeast Scotland: prospective observational study

L. Ritchie, J. Rawles, K. Jennings, 1998, BMJ.

COVID-19 hospital admissions and deaths after BNT162b2 and ChAdOx1 nCoV-19 vaccinations in 2·57 million people in Scotland (EAVE II): a prospective cohort study

Colin Simpson, S. de Lusignan, S. Katikireddi, 2021, The Lancet Respiratory Medicine.

Tamoxifen-warfarin interaction: the Aberdeen hospitals drug file.

L. Ritchie, S. M. Grant, 1989, BMJ.

Population implications of lipid lowering for prevention of coronary heart disease: data from the 1995 Scottish health survey

I. Haq, L. Ritchie, C. Isles, 2001, Heart.

Factors contributing to the time taken to consult with symptoms of lung cancer: a cross-sectional study

S. Ziebland, S. Wyke, M. Nicolson, 2008, Thorax.

Anticipatory care planning and integration: a primary care pilot study aimed at reducing unplanned hospitalisation.

Amanda J Lee, L. Ritchie, S. Fielding, 2012, The British journal of general practice : the journal of the Royal College of General Practitioners.

Outpatient Cardiac Rehabilitation: Are the Potential Benefits Being Realised?

J. Grimshaw, N. Campbell, L. Ritchie, 1996, Journal of the Royal College of Physicians of London.

Cardiac rehabilitation: the agenda set by post-myocardial-infarction patients

J. Grimshaw, L. Ritchie, J. Rawles, 1994 .

Targeted screening for lung cancer with autoantibodies.

F. Mair, J. Haughney, D. Kendrick, 2021, medRxiv.

Secondary prevention clinics for coronary heart disease: randomised trial of effect on health

N. Campbell, L. Ritchie, J. Rawles, 1998, BMJ.

Earlier diagnosis of lung cancer in a randomised trial of an autoantibody blood test followed by imaging

F. Mair, J. Haughney, J. Robertson, 2020, European Respiratory Journal.

Vaccine effectiveness of live attenuated and trivalent inactivated influenza vaccination in 2010/11 to 2015/16: the SIVE II record linkage study.

Colin Simpson, A. Sheikh, J. Schwarze, 2020, Health technology assessment.

Effectiveness of Influenza Vaccines in Asthma: A Systematic Review and Meta-Analysis

Colin Simpson, A. Sheikh, N. Papadopoulos, 2017, Clinical infectious diseases : an official publication of the Infectious Diseases Society of America.

Evaluating the effectiveness, impact and safety of live attenuated and seasonal inactivated influenza vaccination: protocol for the Seasonal Influenza Vaccination Effectiveness II (SIVE II) study

Colin Simpson, A. Sheikh, J. Schwarze, 2017, BMJ Open.

A cardiovascular disease policy model: part 2—preparing for economic evaluation and to assess health inequalities

M. Woodward, H. Tunstall-Pedoe, J. Lewsey, 2016, Open Heart.

Second-dose ChAdOx1 and BNT162b2 COVID-19 vaccines and thrombocytopenic, thromboembolic and hemorrhagic events in Scotland

Colin Simpson, S. de Lusignan, S. Katikireddi, 2022, Nature Communications.

Vaccine Effectiveness of Two-Dose BNT162b2 Over Time Against COVID-19 Symptomatic Infection and Severe Cases Among Adolescents: Test Negative Design Case Control Studies in Brazil and Scotland

Colin Simpson, S. Katikireddi, N. Pearce, 2022, SSRN Electronic Journal.

Two-dose ChAdOx1 nCoV-19 vaccine protection against COVID-19 hospital admissions and deaths over time: a retrospective, population-based cohort study in Scotland and Brazil

Colin Simpson, S. Katikireddi, I. Rudan, 2021, The Lancet.

Targeted screening for peripheral arterial disease in general practice: a pilot study in a high risk group.

Amanda J Lee, J. Brittenden, N. Campbell, 2007, The British journal of general practice : the journal of the Royal College of General Practitioners.

Seasonal Influenza Vaccine Effectiveness (SIVE): an observational retrospective cohort study – exploitation of a unique community-based national-linked database to determine the effectiveness of the seasonal trivalent influenza vaccine

Colin Simpson, A. Sheikh, L. Ritchie, 2013 .

Can audit of a local protocol for the management of lipid disorders effect and detect a change in clinical practice?

J. Grimshaw, L. Ritchie, J. Broom, 1997, Health bulletin.

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.

Effects of secondary prevention clinics on health status in patients with coronary heart disease: 4 year follow-up of a randomized trial in primary care.

P. Murchie, N. Campbell, L. Ritchie, 2004, Family practice.

Cost effectiveness of nurse led secondary prevention clinics for coronary heart disease in primary care: follow up of a randomised controlled trial

Peter Murchie, James P Raftery, Lewis D Ritchie, 2005, BMJ : British Medical Journal.

Community hospitals: new wine in old bottles?

L. Ritchie, K. Robinson, 1998, The British journal of general practice : the journal of the Royal College of General Practitioners.

Allopurinol versus usual care in UK patients with ischaemic heart disease (ALL-HEART): a multicentre, prospective, randomised, open-label, blinded-endpoint trial

A. Doney, C. Hawkey, A. Avery, 2022, The Lancet.

Impact of COVID-19 lockdown on the incidence and mortality of acute exacerbations of chronic obstructive pulmonary disease: national interrupted time series analyses for Scotland and Wales

Colin Simpson, R. Lyons, Shanya Sivakumaran, 2021, BMC Medicine.

Reducing time before consulting with symptoms of lung cancer: randomised controlled trial

S. Wyke, M. Johnston, M. Nicolson, 2013 .

University of Dundee Improved genome editing in human cell lines using the CRISPR method

B. Guthrie, M. Bennie, S. Treweek, 2017 .

Risk assessment in primary prevention of coronary heart disease: randomised comparison of three scoring methods

J. Norrie, P. Murchie, L. Ritchie, 2000, BMJ : British Medical Journal.

Striking the right balance in colorectal cancer care--a qualitative study of rural and urban patients.

J. Cassidy, N. Campbell, L. Ritchie, 2002, Family practice.

Data feedback and behavioural change intervention to improve primary care prescribing safety (EFIPPS): multicentre, three arm, cluster randomised controlled trial

Bruce Guthrie, Chris Robertson, Shaun Treweek, 2016, British Medical Journal.

Trivalent inactivated seasonal influenza vaccine effectiveness for the prevention of laboratory-confirmed influenza in a Scottish population 2000 to 2009.

Colin Simpson, A. Sheikh, L. Ritchie, 2015, Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin.

Temporal trends and forecasting of COVID-19 hospitalisations and deaths in Scotland using a national real-time patient-level data platform: a statistical modelling study

Colin Simpson, C. Robertson, L. Ritchie, 2021, The Lancet Digital Health.

Simpson, C R and Lone, N I and Kavanagh, K and Ritchie, L D and Robertson, C and Sheikh, Azziz and McMenamin, J (2015) Trivalent inactivated seasonal influenza vaccine effectiveness for the prevention of laboratory-confirmed influenza in a Scottish population

Colin Simpson, A. Sheikh, C. Robertson, 2018 .

External validation of the QCovid risk prediction algorithm for risk of COVID-19 hospitalisation and mortality in adults: national validation cohort study in Scotland

Colin Simpson, J. Hippisley-Cox, L. Ritchie, 2021, Thorax.

A cardiovascular disease policy model that predicts life expectancy taking into account socioeconomic deprivation

M. Woodward, H. Tunstall-Pedoe, J. Lewsey, 2014, Heart.

Characterising adults in Scotland who are not vaccinated against COVID-19

Colin Simpson, L. Ritchie, C. McCowan, 2022, The Lancet.

HYPERTENSION: COMMUNITY CONTROL OF HIGH BLOOD PRESSURE (3rd edition)

L. Ritchie, 1994 .