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J

James R. Carpenter

university of london

73H-index
587Paper Count
5.8WCitation Count
Published Papers 82
Publication Date
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Enhanced patient counselling and SMS reminder messages to improve access to community-based eye care services in Meru, Kenya: an embedded, pragmatic, individual-level, randomised, controlled, adaptive platform trial
errThe Lancet Global Health
IF18
err2025-12-09
err0
errOAAI
errLuke N Allen; Min Jung Kim; Michael Gichangi; David Macleod; James Carpenter; Malebogo Tlhajoane; Sarah Karanja; Nigel Bolster; Cosmas Bunywera; Hilary Rono; Francesco Merletti; Demissie Tadesse; Kennedy Odero; David Munyendo; Aphiud Njeru; Solomon Murira; Thadeus Omoga; Amos Mutunga; Matthew Burton; Andrew Bastawrous
errShare
errSave
Mind the Gaps: Literature Survey Reveals Shortcomings in Handling Missing Data in Clinical Practice Research Datalink (CPRD); a UK Primary Care Health Records Database
errClinical Epidemiology
IF5.2
err2025-11-04
err0
errOAAI
errEsther Tolani; Miriam Rachel Carpenter; Irene Petersen; James R Carpenter
errShare
errSave
Age, sex and sexual orientation effects in the Safetxt trial: secondary data analysis of a randomised controlled trial
errSEXUALLY TRANSMITTED INFECTIONS
IF2.9
err2024-11-07
err0
PREAI
errBerendes, Sima; Palmer, Melissa J.; Hickson, Ford Colin Ian; Bradley, Ellen; McCarthy, Ona L.; Carpenter, James R.; Free, Caroline
errShare
errSave
Application of the estimand framework for an emulated trial using reference based multiple imputation to investigate informative censoring
errBMC MEDICAL RESEARCH METHODOLOGY
IF3.4
err2024-10-18
err0
errOAAI
errAtkinson, A.; Zwahlen, M.; De Wit, S.; Furrer, H.; Carpenter, J. R.
errShare
errSave
Multiple imputation using auxiliary imputation variables that only predict missingness can increase bias due to data missing not at random
errBMC MEDICAL RESEARCH METHODOLOGY
IF3.4
err2024-10-07
err2
errOAAI
errCurnow, Elinor; Cornish, Rosie P.; Heron, Jon E.; Carpenter, James R.; Tilling, Kate
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errSave
Unleashing the full potential of digital outcome measures in clinical trials: eight questions that need attention
errBMC MEDICINE
IF8.3
err2024-09-27
err1
errOAAI
errTackney, Mia S.; Carpenter, James R.; Villar, Sofia S.
errShare
errSave
Human Nephrogenesis can Persist Beyond 40 Postnatal Days in Preterm Infants
errKIDNEY INTERNATIONAL REPORTS
IF5.7
err2024-02-01
err4
errOAAI
errCarpenter, James; Yarlagadda, Sunitha; Vandenheuvel, Katherine A.; Ding, Lili; Schuh, Meredith P.
errShare
errSave
The role of placebo control in clinical trials for neurodegenerative diseases
errNATURE MEDICINE
IF50
err2023-09-14
err1
PREAI
errMehta, Arpan R.; Carpenter, James R.; Nicholas, Jennifer M.; Chataway, Jeremy; Virgo, Bruce; Parmar, Mahesh K. B.; Chandran, Siddharthan; Pal, Suvankar
errShare
errSave
Multiple imputation of missing data under missing at random: compatible imputation models are not sufficient to avoid bias if they are mis-specified
errJOURNAL OF CLINICAL EPIDEMIOLOGY
IF5.2
err2023-08-01
err7
errOAAI
errCurnow, Elinor; Capenter, James R.; Heron, Jon E.; Cornish, Rosie P.; Rach, Stefan; Didelez, Vanessa; Langeheine, Malte; Tilling, Kate
errShare
errSave
The DetectDeviatingCells algorithm was a useful addition to the toolkit for cellwise error detection in observational data
errJOURNAL OF CLINICAL EPIDEMIOLOGY
IF5.2
err2023-05-01
err1
errOAAI
errViviani, Laura; White, Ian R.; Williamson, Elizabeth J.; Carpenter, James; Meulen, Jan van der; Cromwell, David A.
errShare
errSave
Towards a multi-arm multi-stage platform trial of disease modifying approaches in Parkinson's disease
errBRAIN
IF11.7
err2023-02-28
err16
errOAAI
errFoltynie, Tom; Gandhi, Sonia; Gonzalez-Robles, Cristina; Zeissler, Marie-Louise; Mills, Georgia; Barker, Roger; Carpenter, James; Schrag, Anette; Schapira, Anthony; Bandmann, Oliver; Mullin, Stephen; Duffen, Joy; McFarthing, Kevin; Chataway, Jeremy; Parmar, Mahesh; Carroll, Camille
errShare
errSave
Effectiveness of a behavioural intervention delivered by text messages (safetxt) on sexually transmitted reinfections in people aged 16-24 years: randomised controlled trial
errBMJ-BRITISH MEDICAL JOURNAL
IF42.7
err2022-09-28
err3
errOAAI
errFree, Caroline; Palmer, Melissa J.; McCarthy, Ona L.; Jerome, Lauren; Berendes, Sima; Knight, Megan; Carpenter, James R.; Morris, Tim P.; Jamal, Zahra; Dhaliwal, Farandeep; French, Rebecca S.; Hickson, Ford Colin Ian; Gubijev, Anasztazia; Wellings, Kaye; Baraitser, Paula; Roberts, Ian; Bailey, Julia, V; Clayton, Tim; Devries, Karen; Edwards, Phil; Hart, Graham; Michie, Susan; Macgregor, Louis; Turner, Katy M. E.; Potter, Kimberley
errShare
errSave
Evaluating how clear the questions being investigated in randomised trials are: systematic review of estimands
errBMJ-BRITISH MEDICAL JOURNAL
IF42.7
err2022-08-23
err19
errOAAI
errCro, Suzie; Kahan, Brennan C.; Rehal, Sunita; Ster, Anca Chis; Carpenter, James R.; White, Ian R.; Cornelius, Victoria
errShare
errSave
A Comparison of Three Popular Methods for Handling Missing Data: Complete-Case Analysis, Inverse Probability Weighting, and Multiple Imputation
errSOCIOLOGICAL METHODS & RESEARCH
IF6.5
err2022-08-05
err37
PREAI
errLittle, Roderick J.; Carpenter, James R.; Lee, Katherine J.
errShare
errSave
Smarter adaptive platform clinical trials in neurology: a showcase for UK innovation
errBRAIN
IF11.7
err2022-05-10
err5
errOAAI
errMehta, Arpan R.; Pal, Suvankar; Chataway, Jeremy; Carpenter, James R.; Parmar, Mahesh K. B.; Chandran, Siddharthan
errShare
errSave
Variation in colon cancer survival for patients living and receiving care in London, 2006-2013: does where you live matter?
errJOURNAL OF EPIDEMIOLOGY AND COMMUNITY HEALTH
IF3.7
err2021-08-16
err2
errOAAI
errQuaresma, Manuela; Carpenter, James R.; Turculet, Adrian; Rachet, Bernard
errShare
errSave
Medications for chronic obstructive pulmonary disease: a historical non-interventional cohort study with validation against RCT results
errHEALTH TECHNOLOGY ASSESSMENT
IF4
err2021-08-01
err4
errOAAI
errWing, Kevin; Williamson, Elizabeth; Carpenter, James R.; Wise, Lesley; Schneeweiss, Sebastian; Smeeth, Liam; Quint, Jennifer K.; Douglas, Ian
errShare
errSave
Current Practices in Missing Data Handling for Interrupted Time Series Studies Performed on Individual-Level Data: A Scoping Review in Health Research
errclinical epidemiology
IF3.2
err2021-07-01
err4
errOAAI
errBazo-Alvarez, Juan Carlos; Morris, Tim P.; Carpenter, James R.; Petersen, Irene
errShare
errSave
A framework for handling missing accelerometer outcome data in trials
errTRIALS
IF2
err2021-06-05
err17
errOAAI
errTackney, Mia S.; Cook, Derek G.; Stahl, Daniel; Ismail, Khalida; Williamson, Elizabeth; Carpenter, James
errShare
errSave
Framework for the treatment and reporting of missing data in observational studies: The Treatment And Reporting of Missing data in Observational Studies framework
errJOURNAL OF CLINICAL EPIDEMIOLOGY
IF5.2
err2021-06-01
err163
errOAAI
errLee, Katherine J.; Tilling, Kate M.; Cornish, Rosie P.; Little, Roderick J. A.; Bell, Melanie L.; Goetghebeur, Els; Hogan, Joseph W.; Carpenter, James R.
errShare
errSave

Research Directions

No research directions
Co-authors
Cooperation Journals
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Douglas G. Altman
H-index: 257 · Papers: 962
J
John P. A. Ioannidis
H-index: 226 · Papers: 1.9K
D
David Moher
H-index: 214 · Papers: 1.5K
H
Holger J. Schünemann
H-index: 174 · Papers: 1.2K
P
Paul Elliott
H-index: 169 · Papers: 1.4K
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