Skip to content

Home Search Authors Pakistan News Saved

SciRah

SciRah does not host or store research papers. Results come live from free, official scholarly APIs, and every paper links back to its original source.

Data sources

OpenAlex
Semantic Scholar
Crossref
CORE
arXiv
PubMed

Privacy policy Terms of service

J. Ensor · SciRah

Researcher profile · Semantic Scholar

J. Ensor

Share profile

J. Ensor — researcher profile on SciRah

h-index: 33
Works: 115
Citations: 9,991

Most-cited papers

Calculating the sample size required for developing a clinical prediction model
R. Riley, J. Ensor, K. Snell, F. Harrell +5 more
2020British medical journal2,598 citations Open access
Semantic Scholar
Minimum sample size for developing a multivariable prediction model: PART II ‐ binary and time‐to‐event outcomes
R. Riley, K. Snell, J. Ensor, D. Burke +3 more
2018Statistics in Medicine1,269 citations Open access
Semantic Scholar
A guide to systematic review and meta-analysis of prognostic factor studies
R. Riley, K. Moons, K. Snell, J. Ensor +5 more
2019British medical journal688 citations Open access
Semantic Scholar
A guide to systematic review and meta-analysis of prediction model performance
Thomas P. A. Debray, J. Damen, K. Snell, J. Ensor +4 more
2017British medical journal609 citations Open access
Semantic Scholar
External validation of clinical prediction models using big datasets from e-health records or IPD meta-analysis: opportunities and challenges
R. Riley, J. Ensor, K. Snell, Thomas P. A. Debray +3 more
2016British medical journal552 citations Open access
Semantic Scholar
Meta‐analysis using individual participant data: one‐stage and two‐stage approaches, and why they may differ
D. Burke, J. Ensor, R. Riley
2016Statistics in Medicine480 citations Open access
Semantic Scholar
Evaluation of clinical prediction models (part 2): how to undertake an external validation study
R. Riley, Lucinda Archer, K. Snell, J. Ensor +4 more
2024British medical journal462 citations Open access
Semantic Scholar
Minimum sample size for external validation of a clinical prediction model with a binary outcome
R. Riley, T. Debray, G. Collins, Lucinda Archer +3 more
2021Statistics in Medicine344 citations Open access
Semantic Scholar
Minimum sample size for developing a multivariable prediction model: Part I – Continuous outcomes
R. Riley, K. Snell, J. Ensor, D. Burke +3 more
2018Statistics in Medicine341 citations Open access
Semantic Scholar
Evaluation of clinical prediction models (part 3): calculating the sample size required for an external validation study
R. Riley, K. Snell, Lucinda Archer, J. Ensor +4 more
2024British medical journal210 citations Open access
Semantic Scholar
Factors affecting local regrowth after watch and wait for patients with a clinical complete response following chemoradiotherapy in rectal cancer (InterCoRe consortium): an individual participant data meta-analysis.
S. Chadi, L. Malcomson, J. Ensor, R. Riley +29 more
2018The Lancet Gastroenterology and Hepatology168 citations Open access
Semantic Scholar
Minimum sample size for developing a multivariable prediction model using multinomial logistic regression
Alexander Pate, R. Riley, G. Collins, M. van Smeden +3 more
2022Statistical Methods in Medical Research158 citations Open access
Semantic Scholar
Individual participant data meta‐analysis to examine interactions between treatment effect and participant‐level covariates: Statistical recommendations for conduct and planning
R. Riley, T. Debray, David Fisher, M. Hattle +8 more
2020Statistics in Medicine148 citations Open access
Semantic Scholar
Risk-of-bias assessment using RoB2 was useful but challenging and resource-intensive: observations from a systematic review.
T. Crocker, N. Lam, M. Jordão, C. Brundle +5 more
2023Journal of Clinical Epidemiology127 citations Open access
Semantic Scholar
Importance of sample size on the quality and utility of AI-based prediction models for healthcare.
R. Riley, J. Ensor, K. Snell, Lucinda Archer +13 more
2025The Lancet Digital Health113 citations Open access
Semantic Scholar
Meta-analysis of prediction model performance across multiple studies: Which scale helps ensure between-study normality for the C-statistic and calibration measures?
K. Snell, J. Ensor, Thomas P. A. Debray, K. Moons +1 more
2017Statistical Methods in Medical Research109 citations Open access
Semantic Scholar
External validation of clinical prediction models: simulation-based sample size calculations were more reliable than rules-of-thumb
K. Snell, Lucinda Archer, J. Ensor, L. Bonnett +4 more
2021Journal of Clinical Epidemiology108 citations Open access
Semantic Scholar
TRIPOD+AI statement: updated guidance for reporting clinical prediction models that use regression or machine learning methods
Gary S. Collins, K. Moons, P. Dhiman, R. Riley +203 more
2024British medical journal107 citations Open access
Semantic Scholar
Minimum sample size for external validation of a clinical prediction model with a continuous outcome
Lucinda Archer, K. Snell, J. Ensor, M. Hudda +2 more
2020Statistics in Medicine103 citations Open access
Semantic Scholar
Minimum sample size calculations for external validation of a clinical prediction model with a time‐to‐event outcome
R. Riley, G. Collins, J. Ensor, Lucinda Archer +6 more
2021Statistics in Medicine97 citations Open access
Semantic Scholar
Persistent sex disparities in clinical outcomes with percutaneous coronary intervention: Insights from 6.6 million PCI procedures in the United States
Jessica Potts, A. Sirker, Sara C. Martinez, M. Gulati +8 more
2018PLoS ONE89 citations Open access
Semantic Scholar
One‐stage individual participant data meta‐analysis models: estimation of treatment‐covariate interactions must avoid ecological bias by separating out within‐trial and across‐trial information
Hairui Hua, D. Burke, M. Crowther, J. Ensor +2 more
2016Statistics in Medicine89 citations Open access
Semantic Scholar
Multivariate meta-analysis of individual participant data helped externally validate the performance and implementation of a prediction model
K. Snell, Harry Hua, Thomas P. A. Debray, J. Ensor +3 more
2016Journal of Clinical Epidemiology71 citations Open access
Semantic Scholar
Uncertainty of risk estimates from clinical prediction models: rationale, challenges, and approaches
R. Riley, Gary S. Collins, Laura Kirton, K. Snell +16 more
2025British medical journal69 citations Open access
Semantic Scholar
Community based complex interventions to sustain independence in older people: systematic review and network meta-analysis
T. Crocker, J. Ensor, N. Lam, Magda Jordão +19 more
2024British medical journal60 citations Open access
Semantic Scholar
University of Birmingham A systematic review of prognostic models for recurrent venous thromboembolism (VTE) post treatment of first unprovoked VTE
J. Ensor, R. D. Riley, D. Moore, K. Snell +2 more
201657 citations
Semantic Scholar
PMCALPLOT: Stata module to produce calibration plot of prediction model performance
J. Ensor, K. Snell, E. Martin
202055 citations
Semantic Scholar
Two-stage or not two-stage? That is the question for IPD meta-analysis projects
R. Riley, J. Ensor, M. Hattle, K. Papadimitropoulou +1 more
2023Research Synthesis Methods46 citations Open access
Semantic Scholar
Comparative effectiveness of treatment options for subacromial shoulder conditions: a systematic review and network meta-analysis
O. Babatunde, J. Ensor, C. Littlewood, L. Chesterton +6 more
2021Therapeutic Advances in Musculoskeletal Disease41 citations Open access
Semantic Scholar
Temporal recalibration for improving prognostic model development and risk predictions in settings where survival is improving over time
Sarah Booth, R. Riley, J. Ensor, P. Lambert +1 more
2020International Journal of Epidemiology40 citations Open access
Semantic Scholar
Prediction of risk of recurrence of venous thromboembolism following treatment for a first unprovoked venous thromboembolism: systematic review, prognostic model and clinical decision rule, and economic evaluation.
J. Ensor, R. Riley, S. Jowett, Mark Monahan +4 more
2016Health Technology Assessment39 citations Open access
Semantic Scholar
Temporal trends and inequalities in coronary angiography utilization in the management of non-ST-Elevation acute coronary syndromes in the U.S.
M. Rashid, D. Fischman, M. Gulati, Khalid Tamman +8 more
2019Scientific Reports33 citations Open access
Semantic Scholar
Wild goose chase – no predictable patient subgroups benefit from meniscal surgery: patient-reported outcomes of 641 patients 1 year after surgery
K. Pihl, J. Ensor, G. Peat, M. Englund +5 more
2019British Journal of Sports Medicine31 citations Open access
Semantic Scholar
Individual participant data meta‐analysis of continuous outcomes: A comparison of approaches for specifying and estimating one‐stage models
A. Legha, R. Riley, J. Ensor, K. Snell +2 more
2018Statistics in Medicine29 citations Open access
Semantic Scholar
Elixhauser outperformed Charlson comorbidity index in prognostic value after ACS: insights from a national registry.
Fang-Yuan Zhang, Yi-Da Chiu, J. Ensor, M. Mohamed +2 more
2021Journal of Clinical Epidemiology28 citations Open access
Semantic Scholar
One‐stage individual participant data meta‐analysis models for continuous and binary outcomes: Comparison of treatment coding options and estimation methods
R. Riley, A. Legha, D. Jackson, T. Morris +4 more
2020Statistics in Medicine27 citations Open access
Semantic Scholar
Systematic review of prognostic models for recurrent venous thromboembolism (VTE) post-treatment of first unprovoked VTE
J. Ensor, R. Riley, D. Moore, K. Snell +2 more
2016BMJ Open27 citations Open access
Semantic Scholar
Impact of Charlson Co-Morbidity Index Score on Management and Outcomes After Acute Coronary Syndrome.
Fang-Yuan Zhang, A. Bharadwaj, M. Mohamed, J. Ensor +2 more
2020American Journal of Cardiology23 citations Open access
Semantic Scholar
Statistical primer: sample size considerations for developing and validating clinical prediction models
Glen P. Martin, Richard D. Riley, J. Ensor, S. Grant
2025European Journal of Cardio-Thoracic Surgery22 citations Open access
Semantic Scholar
PMSAMPSIZE: Stata module to calculate the minimum sample size required for developing a multivariable prediction model
J. Ensor
201922 citations
Semantic Scholar
Deriving percentage study weights in multi-parameter meta-analysis models: with application to meta-regression, network meta-analysis and one-stage individual participant data models
R. Riley, J. Ensor, D. Jackson, D. Burke
2017Statistical Methods in Medical Research22 citations Open access
Semantic Scholar
Guidance for deriving and presenting percentage study weights in meta‐analysis of test accuracy studies
D. Burke, J. Ensor, K. Snell, D. van der Windt +1 more
2018Research Synthesis Methods21 citations Open access
Semantic Scholar
Simulation-based power calculations for planning a two-stage individual participant data meta-analysis
J. Ensor, D. Burke, K. Snell, K. Hemming +1 more
2018BMC Medical Research Methodology19 citations Open access
Semantic Scholar
Temporal Trends in Comorbidity Burden and Impact on Prognosis in Patients With Acute Coronary Syndrome Using the Elixhauser Comorbidity Index Score.
Fang-Yuan Zhang, M. Mohamed, J. Ensor, G. Peat +1 more
2020American Journal of Cardiology18 citations Open access
Semantic Scholar
Temporal Changes in Co-Morbidity Burden in Patients Having Percutaneous Coronary Intervention and Impact on Prognosis.
Jessica Potts, Chun S. Kwok, J. Ensor, M. Rashid +8 more
2018American Journal of Cardiology18 citations Open access
Semantic Scholar
Predicting antipsychotic-induced weight gain in first episode psychosis – A field-wide systematic review and meta-analysis of non-genetic prognostic factors
I. Fitzgerald, L. Sahm, Amy Byrne, J. O'Connell +4 more
2023European psychiatry17 citations Open access
Semantic Scholar
Effects of lifestyle interventions in pregnancy on gestational diabetes: individual participant data and network meta-analysis
J. Allotey, Dyuti Coomar, J. Ensor, Gabriel Ruiz-Calvo +90 more
2026British medical journal14 citations Open access
Semantic Scholar
Community-based complex interventions to sustain independence in older people, stratified by frailty: a protocol for a systematic review and network meta-analysis
T. Crocker, A. Clegg, R. Riley, N. Lam +7 more
2021BMJ Open14 citations Open access
Semantic Scholar
Individual participant data meta‐analysis for external validation, recalibration, and updating of a flexible parametric prognostic model
J. Ensor, K. Snell, T. Debray, P. Lambert +4 more
2021Statistics in Medicine14 citations Open access
Semantic Scholar
Meta‐analysis of test accuracy studies using imputation for partial reporting of multiple thresholds
J. Ensor, J. Deeks, E. Martin, R. Riley
2017Research Synthesis Methods13 citations Open access
Semantic Scholar

Frequent co-authors

Invite them to SciRah by sharing their profile.

R. Riley×31
Invite
R. Riley — researcher profile on SciRah
K. Snell×23
Invite
K. Snell — researcher profile on SciRah
G. Collins×10
Invite
G. Collins — researcher profile on SciRah
D. Burke×10
Invite
D. Burke — researcher profile on SciRah

×8

Invite

K. Moons — researcher profile on SciRah

Lucinda Archer×8

Invite

Lucinda Archer — researcher profile on SciRah

Invite

M. Mamas — researcher profile on SciRah

Thomas P. A. Debray×6

Invite

Thomas P. A. Debray — researcher profile on SciRah

Invite

R. Riley — researcher profile on SciRah

Invite

F. Harrell — researcher profile on SciRah

M. van Smeden×5

Invite

M. van Smeden — researcher profile on SciRah

Invite

P. Dhiman — researcher profile on SciRah