Personal information

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Employment (1)

University of Oxford: Oxford, GB

Honorary Research Fellow (Nuffield Department of Primary Care Health Sciences)
Employment
Source: Self-asserted source
Richard Croker

Works (50 of 64)

Items per page:
Page 1 of 2

Trends and variation in andexanet alfa for the reversal of direct oral anticoagulants in NHS Trusts in England

2025-01-22 | Preprint
Contributors: Louis Fisher; Richard Buka; Rosalind Byrne; Stephen Black; Helen J Curtis; Christopher Wood; Andrew Brown; Sebastian Bacon; Richard Croker; Ben Goldacre et al.
Source: check_circle
Crossref

Study protocol: Comparison of different risk prediction modelling approaches for COVID-19 related death using the OpenSAFELY platform [version 2; peer review: 3 approved]

2024-12-16 | Journal article
Part of ISSN: 2398-502X
Funded by GRANT_NUMBER:

107731, 082178, 098504, 202912, 201375

Funded by GRANT_NUMBER: 527418645
Funded by GRANT_NUMBER: PG/19/71/34632, EPNCZQ52
Contributors: The OpenSAFELY Collaborative; Elizabeth J. Williamson; John Tazare; Krishnan Bhaskaran; Alex J. Walker; Helen I McDonald; Laurie A. Tomlinson; Sebastian Bacon; Chris Bates; Helen J. Curtis et al.
Source: check_circle
Wellcome Open Research

The impact of COVID‐19 on medication reviews in English primary care. An OpenSAFELY‐TPP analysis of 20 million adult electronic health records

British Journal of Clinical Pharmacology
2024-07 | Journal article
Contributors: Christopher Wood; Victoria Speed; Louis Fisher; Helen J. Curtis; Andrea L. Schaffer; Alex J. Walker; Richard Croker; Andrew D. Brown; Christine Cunningham; William J. Hulme et al.
Source: check_circle
Crossref

Data-Driven Identification of Potentially Successful Intervention Implementations Using 5 Years of Opioid Prescribing Data: Retrospective Database Study

JMIR Public Health and Surveillance
2024-06-05 | Journal article
Contributors: Lisa EM Hopcroft; Helen J Curtis; Richard Croker; Felix Pretis; Peter Inglesby; David Evans; Sebastian Bacon; Ben Goldacre; Alex J Walker; Brian MacKenna
Source: check_circle
Crossref

Variation in prescription duration for long term conditions: a cohort study in English NHS primary care using OpenPrescribing

2024-05-29 | Preprint
Contributors: Brian MacKenna; Andrew D Brown; Rich Croker; Alex J Walker; Apostolos Tsiachristas; Dave Evans; Peter Inglesby; Ben Goldacre; Seb Bacon; Helen J Curtis
Source: check_circle
Crossref

Changes in opioid prescribing during the COVID-19 pandemic in England: cohort study of 20 million patients in OpenSAFELY-TPP

2024-02-24 | Preprint
Contributors: Andrea L Schaffer; Colm D Andrews; Andrew D Brown; Richard Croker; William J Hulme; Linda Nab; Jane Quinlan; Victoria Speed; Christopher Wood; Milan Wiedemann et al.
Source: check_circle
Crossref

OpenSAFELY: Measuring BMI in 22 million patients in England [version 1; peer review: 2 approved with reservations]

2024-02-12 | Journal article
Part of ISSN: 2398-502X
Funded by GRANT_NUMBER: 222097
Funded by GRANT_NUMBER: HDRUK2021.000, 2021.0157
Funded by GRANT_NUMBER: MC_PC_20058
Funded by GRANT_NUMBER: NIHR135559, COV-LT2-0073
Contributors: Robin Y. Park; Colm Andrews; Helen J. Curtis; Jon Massey; Will J. Hulme; Amir Mehrkar; Seb Bacon; George Hickman; Rebecca Smith; David Evans et al.
Source: check_circle
Wellcome Open Research

Group A streptococcal cases and treatments during the COVID-19 pandemic and 2022 outbreak: a retrospective cohort study in England using OpenSAFELY-TPP

2023-09-23 | Preprint
Contributors: Christine Cunningham; Louis Fisher; Christopher Wood; Victoria Speed; Andrew D Brown; Helen J Curtis; Rose Higgins; Richard Croker; Ben FC Butler-Cole; David Evans et al.
Source: check_circle
Crossref

Data-Driven Identification of Potentially Successful Intervention Implementations Using 5 Years of Opioid Prescribing Data: Retrospective Database Study (Preprint)

2023-07-31 | Preprint
Contributors: Lisa EM Hopcroft; Helen J Curtis; Richard Croker; Felix Pretis; Peter Inglesby; David Evans; Sebastian Bacon; Ben Goldacre; Alex J Walker; Brian MacKenna
Source: check_circle
Crossref

The impact of COVID-19 on medication reviews in English primary care. An OpenSAFELY-TPP analysis of 20 million adult electronic health records

2023-07-31 | Preprint
Contributors: Christopher Wood; Victoria Speed; Louis Fisher; Helen J. Curtis; Andrea L. Schaffer; Alex J. Walker; Richard Croker; Andrew D. Brown; Christine Cunningham; William J. Hulme et al.
Source: check_circle
Crossref

Data-driven identification of potentially successful intervention implementations: a proof of concept using five years of opioid prescribing data from over 7000 practices in England

2023-06-29 | Preprint
Contributors: Lisa E. M. Hopcroft; Helen J. Curtis; Richard Croker; Felix Pretis; Peter Inglesby; Dave Evans; Seb Bacon; Ben Goldacre; Alex J. Walker; Brian MacKenna
Source: check_circle
Crossref

Challenges in Estimating the Effectiveness of COVID-19 Vaccination Using Observational Data

Annals of Internal Medicine
2023-05 | Journal article
Contributors: William J. Hulme; Elizabeth Williamson; Elsie M.F. Horne; Amelia Green; Helen I. McDonald; Alex J. Walker; Helen J. Curtis; Caroline E. Morton; Brian MacKenna; Richard Croker et al.
Source: check_circle
Crossref

Changes in medication safety indicators in England throughout the covid-19 pandemic using OpenSAFELY: population based, retrospective cohort study of 57 million patients using federated analytics

BMJ Medicine
2023-05 | Journal article
Contributors: Louis Fisher; Lisa EM Hopcroft; Sarah Rodgers; James Barrett; Kerry Oliver; Anthony J Avery; Dai Evans; Helen Curtis; Richard Croker; Orla Macdonald et al.
Source: check_circle
Crossref

OpenSAFELY NHS Service Restoration Observatory 2: changes in primary care clinical activity in England during the COVID-19 pandemic

British Journal of General Practice
2023-05 | Journal article
Contributors: Helen J Curtis; Brian MacKenna; Milan Wiedemann; Louis Fisher; Richard Croker; Caroline E Morton; Peter Inglesby; Alex J Walker; Jessica Morley; Amir Mehrkar et al.
Source: check_circle
Crossref

The impact of lidocaine plaster prescribing reduction strategies: a comparison of two national health services in Europe

British Journal of Clinical Pharmacology
2023-05-10 | Journal article
Part of ISSN: 0306-5251
Part of ISSN: 1365-2125
Contributors: Molly Mattsson; Fiona Boland; Ciara Kirke; Michelle Flood; emma wallace; Mary E. Walsh; Derek Corrigan; Tom Fahey; Richard Croker; Sebastian C. J. Bacon et al.
Source: Self-asserted source
Richard Croker

Data-Driven Identification of Unusual Prescribing Behavior: Analysis and Use of an Interactive Data Tool Using 6 Months of Primary Care Data From 6500 Practices in England

JMIR Medical Informatics
2023-04-19 | Journal article
Contributors: Lisa EM Hopcroft; Jon Massey; Helen J Curtis; Brian Mackenna; Richard Croker; Andrew D Brown; Thomas O'Dwyer; Orla Macdonald; David Evans; Peter Inglesby et al.
Source: check_circle
Crossref

The impact of lidocaine plaster prescribing reduction strategies: a comparison of two national health services in Europe

2023-02-28 | Preprint
Contributors: Molly Mattsson; Fiona Boland; Ciara Kirke; Michelle Flood; Emma Wallace; Mary E Walsh; Derek Corrigan; Tom Fahey; Richard Croker; Sebastian C J Bacon et al.
Source: check_circle
Crossref

The impact of the COVID-19 pandemic on Antipsychotic Prescribing in individuals with autism, dementia, learning disability, serious mental illness or living in a care home: A federated analysis of 59 million patients’ primary care records in situ using OpenSAFELY

2023-01-07 | Preprint
Contributors: Orla Macdonald; Amelia Green; Alex Walker; Richard Croker; Helen Curtis; Andrew Brown; Ben Butler-Cole; Colm Andrews; Caroline Morton; Dave Evans et al.
Source: check_circle
Crossref

Identifying Patterns of Clinical Interest in Clinicians’ Treatment Preferences: Hypothesis-free Data Science Approach to Prioritizing Prescribing Outliers for Clinical Review

JMIR Medical Informatics
2022-12-20 | Journal article | Author
Part of ISSN: 2291-9694
Contributors: Brian MacKenna; Helen Curtis; Lisa EM Hopcroft; Alex Walker; Richard Croker; Orla Macdonald; Stephen Evans; Peter Inglesby; David Evans; Jessica Morley et al.
Source: Self-asserted source
Richard Croker
grade
Preferred source (of 2)‎

Data-Driven Identification of Unusual Prescribing Behavior: Analysis and Use of an Interactive Data Tool Using 6 Months of Primary Care Data From 6500 Practices in England (Preprint)

2022-11-11 | Preprint
Contributors: Lisa EM Hopcroft; Jon Massey; Helen J Curtis; Brian Mackenna; Richard Croker; Andrew D Brown; Thomas O'Dwyer; Orla Macdonald; David Evans; Peter Inglesby et al.
Source: check_circle
Crossref

Eleven key measures for monitoring general practice clinical activity during COVID-19 using federated analytics on 48 million adults’ primary care records through OpenSAFELY

2022-10-17 | Preprint
Contributors: Louis Fisher; Helen J. Curtis; Richard Croker; Milan Wiedemann; Victoria Speed; Christopher Wood; Andrew Brown; Lisa EM Hopcroft; Rose Higgins; Jon Massey et al.
Source: check_circle
Crossref

Data-driven identification of unusual prescribing behaviour: an analysis and interactive data tool using six months of primary care data from 6500 practices in England

2022-09-23 | Preprint
Contributors: Lisa EM Hopcroft; Jon Massey; Helen Curtis; Brian MacKenna; Richard Croker; Orla Macdonald; David Evans; Peter Inglesby; Seb Bacon; Tom O’Dwyer et al.
Source: check_circle
Crossref

Recording of ’COVID-19 vaccine declined‘: a cohort study on 57.9 million National Health Service patients’ records in situ using OpenSAFELY, England, 8 December 2020 to 25 May 2021

Eurosurveillance
2022-08-18 | Journal article
Contributors: Helen J Curtis; Peter Inglesby; Brian MacKenna; Richard Croker; William J Hulme; Christopher T Rentsch; Krishnan Bhaskaran; Rohini Mathur; Caroline E Morton; Sebastian CJ Bacon et al.
Source: check_circle
Crossref

A hypothesis-free data science approach to identifying novel patterns of clinical interest in clinicians' treatment preferences: clusters of high Pericyazine and Promazine use in England (Preprint)

2022-07-19 | Preprint
Contributors: Brian MacKenna; Helen J Curtis; Alex J Walker; Richard Croker; Orla Macdonald; Stephen JW Evans; Peter Inglesby; Dave Evans; Jessica Morley; Sebastian CJ Bacon et al.
Source: check_circle
Crossref

OpenSAFELY NHS Service Restoration Observatory 2: changes in primary care activity across six clinical areas during the COVID-19 pandemic

2022-06-02 | Preprint
Contributors: Helen J Curtis; Brian MacKenna; Milan Wiedemann; Louis Fisher; Richard Croker; Caroline E Morton; Peter Inglesby; Alex J Walker; Jessica Morley; Amir Mehrkar et al.
Source: check_circle
Crossref

Changes in English medication safety indicators throughout the COVID-19 pandemic: a federated analysis of 57 million patients’ primary care records in situ using OpenSAFELY

2022-05-07 | Preprint
Contributors: Louis Fisher; Lisa E. M. Hopcroft; Sarah Rodgers; James Barrett; Kerry Oliver; Anthony J. Avery; Dai Evans; Helen Curtis; Richard Croker; Orla Macdonald et al.
Source: check_circle
Crossref

Rates of serious clinical outcomes in survivors of hospitalisation with COVID-19 in England: a descriptive cohort study within the OpenSAFELY platform [version 1; peer review: 2 approved, 1 approved with reservations]

2022-04-29 | Journal article
Part of ISSN: 2398-502X
Funded by GRANT_NUMBER:

107731

Funded by GRANT_NUMBER:

201375

Funded by GRANT_NUMBER:

MR/N013638/1

Funded by GRANT_NUMBER:

MR/V015737/1

Contributors: The OpenSAFELY Collaborative; John Tazare; Alex J. Walker; Laurie A. Tomlinson; George Hickman; Christopher T. Rentsch; Elizabeth J. Williamson; Krishnan Bhaskaran; David Evans; Kevin Wing et al.
Source: check_circle
Wellcome Open Research

Using data science to identify unusual treatment choices in England: illustrative findings of uncommon antipsychotics Pericyazine and Promazine

2022-03-23 | Preprint
Contributors: Brian MacKenna; Helen J Curtis; Alex J Walker; Richard Croker; Orla Macdonald; Stephen JW Evans; Peter Inglesby; Dave Evans; Jessica Morley; Seb CJ Bacon et al.
Source: check_circle
Crossref

Trends, variation and clinical characteristics of recipients of antivirals and neutralising monoclonal antibodies for non-hospitalised COVID-19: a descriptive cohort study of 23.4 million people in OpenSAFELY

2022-03-10 | Preprint
Contributors: Amelia CA Green; Helen J Curtis; Rose Higgins; Rebecca Smith; Amir Mehrkar; Peter Inglesby; Viyaasan Mahalingasivam; Henry Drysdale; Nicholas DeVito; Richard Croker et al.
Source: check_circle
Crossref

A comprehensive high cost drugs dataset from the NHS in England - An OpenSAFELY-TPP Short Data Report [version 1; peer review: 3 approved]

2021-12-22 | Journal article
Part of ISSN: 2398-502X
Funded by GRANT_NUMBER:

107731

Funded by GRANT_NUMBER:

201375

Funded by GRANT_NUMBER: 205039
Funded by GRANT_NUMBER:

222097

Contributors: Anna Rowan; Chris Bates; William Hulme; David Evans; Simon Davy; Nicholas A Kennedy; James Galloway; Kathryn E Mansfield; Katie Bechman; Julian Matthewman et al.
Source: check_circle
Wellcome Open Research

OpenSAFELY: impact of national guidance on switching anticoagulant therapy during COVID-19 pandemic

Open Heart
2021-11 | Journal article
Contributors: Helen J Curtis; Brian MacKenna; Alex J Walker; Richard Croker; Amir Mehrkar; Caroline Morton; Seb Bacon; George Hickman; Peter Inglesby; Chris Bates et al.
Source: check_circle
Crossref

Recording of “COVID-19 vaccine declined” among vaccination priority groups: a cohort study on 57.9 million NHS patients’ primary care records in situ using OpenSAFELY

2021-08-07 | Other
Contributors: Helen J Curtis; Peter Inglesby; Brian MacKenna; Richard Croker; William Hulme; Christopher T Rentsch; Krishnan Bhaskaran; Alex J Walker; Caroline E Morton; David Evans et al.
Source: check_circle
Crossref

Evaluating the impact of a very low-cost intervention to increase practices’ engagement with data and change prescribing behaviour: a randomized trial in English primary care

Family Practice
2021-07-28 | Journal article
Contributors: Helen J Curtis; Seb Bacon; Richard Croker; Alex J Walker; Rafael Perera; Michael Hallsworth; Hugo Harper; Kamal R Mahtani; Carl Heneghan; Ben Goldacre
Source: check_circle
Crossref

Identifying Care Home Residents in Electronic Health Records - An OpenSAFELY Short Data Report [version 1; peer review: 2 approved]

2021-04-27 | Journal article
Part of ISSN: 2398-502X
Contributors: Anna Schultze; Chris Bates; Jonathan Cockburn; Brian MacKenna; Emily Nightingale; Helen J Curtis; William J Hulme; Caroline E Morton; Richard Croker; Seb Bacon et al.
Source: check_circle
Wellcome Open Research
grade
Preferred source (of 2)‎

OpenSAFELY NHS Service Restoration Observatory 1: describing trends and variation in primary care clinical activity for 23.3 million patients in England during the first wave of COVID-19

2021-01-08 | Other
Contributors: Helen J Curtis; Brian MacKenna; Richard Croker; Peter Inglesby; Alex J Walker; Jessica Morley; Amir Mehrkar; Caroline E Morton; Seb Bacon; George Hickman et al.
Source: check_circle
Crossref

OpenSAFELY: impact of national guidance on switching from warfarin to direct oral anticoagulants (DOACs) in early phase of COVID-19 pandemic in England

2020-12-04 | Other
Contributors: Helen J Curtis; Brian MacKenna; Alex J Walker; Richard Croker; Amir Mehrkar; Caroline E Morton; Seb Bacon; George Hickman; Peter Inglesby; Chris Bates et al.
Source: check_circle
Crossref

Impact of Electronic Health Record Interface Design on Unsafe Prescribing of Ciclosporin, Tacrolimus, and Diltiazem: Cohort Study in English National Health Service Primary Care

Journal of Medical Internet Research
2020-10-16 | Journal article
Contributors: Brian MacKenna; Sebastian Bacon; Alex J Walker; Helen J Curtis; Richard Croker; Ben Goldacre
Source: check_circle
Crossref

Hydroxychloroquine for prevention of COVID-19 mortality: a population-based cohort study

2020-09-09 | Other
Contributors: Christopher T Rentsch; Nicholas J DeVito; Brian MacKenna; Caroline E Morton; Krishnan Bhaskaran; Jeremy P Brown; Anna Schultze; William J Hulme; Richard Croker; Alex J Walker et al.
Source: check_circle
Crossref

Trends and variation in unsafe prescribing of methotrexate: a cohort study in English NHS primary care

British Journal of General Practice
2020-07 | Journal article
Part of ISSN: 0960-1643
Part of ISSN: 1478-5242
Contributors: Brian MacKenna; Helen J Curtis; Alex J Walker; Richard Croker; Seb Bacon; Ben Goldacre
Source: Self-asserted source
Richard Croker

Inhaled corticosteroid use and risk COVID-19 related death among 966,461 patients with COPD or asthma: an OpenSAFELY analysis

2020-06-20 | Other
Contributors: Anna Schultze; Alex J Walker; Brian MacKenna; Caroline E Morton; Krishnan Bhaskaran; Jeremy P Brown; Christopher T Rentsch; Elizabeth Williamson; Henry Drysdale; Richard Croker et al.
Source: check_circle
Crossref

Impact Of Electronic Health Record Interface Design On Unsafe Prescribing Of Ciclosporin, Tacrolimus and Diltiazem: A Cohort Study In English NHS Primary Care

2019-11-12 | Other
Contributors: Brian MacKenna; Seb Bacon; Alex J Walker; Helen J Curtis; Richard Croker; Ben Goldacre
Source: check_circle
Crossref

Impact of Electronic Health Record Interface Design on Unsafe Prescribing of Ciclosporin, Tacrolimus, and Diltiazem: Cohort Study in English National Health Service Primary Care (Preprint)

2019-11-11 | Other
Contributors: Brian MacKenna; Sebastian Bacon; Alex J Walker; Helen J Curtis; Richard Croker; Ben Goldacre
Source: check_circle
Crossref

Trends and variation in unsafe prescribing of methotrexate: a cohort study in English NHS primary care

2019-06-26 | Other
Contributors: Brian MacKenna; Helen J Curtis; Alex J Walker; Richard Croker; Seb Bacon; Ben Goldacre
Source: check_circle
Crossref

Optimising laboratory monitoring of chronic conditions in primary care: a quality improvement framework

BMJ Open Quality
2019-03 | Journal article
Contributors: Darunee Whiting; Richard Croker; Jessica Watson; Andy Brogan; Alex J Walker; Tom Lewis
Source: check_circle
Crossref

Do doctors in dispensing practices with a financial conflict of interest prescribe more expensive drugs? A cross-sectional analysis of English primary care prescribing data

BMJ Open
2019-02 | Journal article
Contributors: Ben Goldacre; Carl Reynolds; Anna Powell-Smith; Alex J Walker; Tom A Yates; Richard Croker; Liam Smeeth
Source: check_circle
Crossref

Measuring the Impact of an Open Web-Based Prescribing Data Analysis Service on Clinical Practice: Cohort Study on NHS England Data

Journal of Medical Internet Research
2019-01-16 | Journal article
Contributors: Alex J Walker; Helen J Curtis; Richard Croker; Seb Bacon; Ben Goldacre
Source: check_circle
Crossref

Opioid prescribing trends and geographical variation in England, 1998-2018: a retrospective database study.

The lancet. Psychiatry
2018-12 | Journal article
Contributors: Curtis HJ; Croker R; Walker AJ; Richards GC; Quinlan J; Goldacre B
Source: Self-asserted source
Richard Croker via Europe PubMed Central

Six months on: NHS England needs to focus on dissemination, implementation and audit of its low-priority initiative.

Journal of the Royal Society of Medicine
2018-12 | Journal article
Contributors: Walker AJ; Bacon S; Curtis H; Croker R; MacKenna B; Goldacre B
Source: Self-asserted source
Richard Croker via Europe PubMed Central

Why did some practices not implement new antibiotic prescribing guidelines on urinary tract infection? A cohort study and survey in NHS England primary care.

The Journal of antimicrobial chemotherapy
2018-12 | Journal article
Contributors: Croker R; Walker AJ; Goldacre B
Source: Self-asserted source
Richard Croker via Europe PubMed Central
grade
Preferred source (of 2)‎

Detecting change in comparison to peers in NHS prescribing data: a novel application of cumulative sum methodology.

BMC medical informatics and decision making
2018-07 | Journal article
Contributors: Walker AJ; Bacon S; Croker R; Goldacre B
Source: Self-asserted source
Richard Croker via Europe PubMed Central
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Page 1 of 2

Peer review (2 reviews for 2 publications/grants)

Review activity for Evidence-based medicine (1)
Review activity for PloS one. (1)