Approved studies using CPRD Data

Access to CPRD data, including UK Primary Care Data, and linked data such as Hospital Episode Statistics, is subject to protocol approval via CPRD’s Research Data Governance (RDG) Process. Independent scientific and patient advice is provided by Expert Review Committees (ERCs) and the Central Advisory Committee (CAC). 

A summary of all approved protocols, including a lay and technical summary of the proposed research, is published three months after researchers have access to the data to begin their study. COVID-19 research protocols are being fast-tracked and all approved summaries are published within 72 hours to ensure transparency and to help avoid unnecessary duplication. 

Protocols below are listed in order of date of approval. Please click on the study title for more details. 

Peer-reviewed publications from research using CPRD data will be listed on our bibliography page


Date of Approval Title
15/07/2015 The impact of obesity on healthcare resource utilisation.
17/07/2015 To establish the causal roles of environmental factors on exacerbations of COPD
23/07/2015 The effect of metformin on patient outcome after acute myocardial infarction
31/07/2015 Characterising the natural history and risk factors for the development of psoriatic arthritis in a UK population
05/08/2015 Use of COX-2 inhibitors and risk of glioma
07/08/2015 A drug utilisation cohort study of patients prescribed medicines from different classes of renin-angiotensin system blocking agents in UK primary care
12/08/2015 Mortality of people with learning disability
17/08/2015 Alcohol misuse and injury outcomes in adolescents aged 10-24 using linked UK health data
18/08/2015 Risk of fragility fracture across inflammatory conditions: a UK population study
28/08/2015 Cluster Headache Patient Prevalence and Prescribed Treatments in the UK Clinical Practice Research Datalink
28/08/2015 Characteristics of newly diagnosed adults with Type 1 diabetes in the UK and their evolution over the first 5 years
28/08/2015 Demographic and clinical characteristics of T2DM patients treated with DPP-4 and SGLT2 inhibitors in the absence of a current clinical guideline - A CPRD Study
01/09/2015 Medical resource use and costs associated with diabetes complications in the population of diabetes patients receiving insulin therapy in the United Kingdom
04/09/2015 Time to treatment intensification and associated outcomes among patients with Type 2 diabetes mellitus in the UK
11/09/2015 Healthcare resource utilisation and economic impact among kidney transplant patients during the last year before graft failure in the UK: a retrospective observational study
11/09/2015 Healthcare resource utilisation and economic impact among liver transplant patients during the last year before graft failure in the UK: a retrospective observational study
14/09/2015 The incidence of Guillain-Barre Syndrome in the United Kingdom from April 2005 to March 2015.
15/09/2015 Assessing channelling bias and effectiveness in newly marketed glucose-lowering medications - a retrospective cohort study
15/09/2015 Can Continuity Of Primary Care Decrease Unscheduled Secondary Care Use?
18/09/2015 Study to investigate the drug treatment for sialorrhoea in children over the past 10 years.