Works by Morris, Tim P.

Results: 73

Estimands in published protocols of randomised trials: urgent improvement needed.

Published in:

2021

By:

Kahan, Brennan C;
Morris, Tim P;
White, Ian R;
Carpenter, James;
Cro, Suzie

Publication type:

journal article

Analysis of multicenter clinical trials with very low event rates.

Published in:

2020

By:

Kim, Jiyu;
Troxel, Andrea B.;
Halpern, Scott D.;
Volpp, Kevin G.;
Kahan, Brennan C.;
Morris, Tim P.;
Harhay, Michael O.

Publication type:

journal article

A four-step strategy for handling missing outcome data in randomised trials affected by a pandemic.

Published in:

2020

By:

Cro, Suzie;
Morris, Tim P.;
Kahan, Brennan C.;
Cornelius, Victoria R.;
Carpenter, James R.

Publication type:

journal article

How are missing data in covariates handled in observational time-to-event studies in oncology? A systematic review.

Published in:

2020

By:

Carroll, Orlagh U.;
Morris, Tim P.;
Keogh, Ruth H.

Publication type:

journal article

Redressing the balance: Covariate adjustment in randomised trials.

Published in:

BJOG: An International Journal of Obstetrics & Gynaecology, 2021, v. 128, n. 10, p. 1573, doi. 10.1111/1471-0528.16759

By:

Kahan, Brennan C.;
Morris, Tim P.

Publication type:

Article

Behavioural intervention to reduce sexually transmitted infections in people aged 16-24 years in the UK: the safetxt RCT.

Published in:

Public Health Research, 2023, v. 11, n. 1, p. viii, doi. 10.3310/DANE8826

By:

Free, Caroline;
Palmer, Melissa J.;
Potter, Kimberley;
McCarthy, Ona L.;
Jerome, Lauren;
Berendes, Sima;
Gubijev, Anasztazia;
Knight, Megan;
Jamal, Zahra;
Dhaliwal, Farandeep;
Carpenter, James R.;
Morris, Tim P.;
Edwards, Phil;
French, Rebecca;
Macgregor, Louis;
Turner, Katy M. E.;
Baraitser, Paula;
Hickson, Ford C. I.;
Wellings, Kaye;
Roberts, Ian

Publication type:

Article

Internet-accessed sexually transmitted infection (e-STI) testing and results service: A randomised, single-blind, controlled trial.

Published in:

2017

By:

Wilson, Emma;
Free, Caroline;
Morris, Tim P.;
Syred, Jonathan;
Ahamed, Irrfan;
Menon-Johansson, Anatole S.;
Palmer, Melissa J.;
Barnard, Sharmani;
Rezel, Emma;
Baraitser, Paula

Publication type:

journal article

Treatment estimands in clinical trials of patients hospitalised for COVID-19: ensuring trials ask the right questions.

Published in:

2020

By:

Kahan, Brennan C.;
Morris, Tim P.;
White, Ian R.;
Tweed, Conor D.;
Cro, Suzie;
Dahly, Darren;
Pham, Tra My;
Esmail, Hanif;
Babiker, Abdel;
Carpenter, James R.

Publication type:

journal article

Effects of long-term antipsychotics treatment on body weight: A population-based cohort study.

Published in:

2020

By:

Bazo-Alvarez, Juan Carlos;
Morris, Tim P;
Carpenter, James R;
Hayes, Joseph F;
Petersen, Irene

Publication type:

journal article

Prospective International Cohort Study Demonstrates Inability of Interim PET to Predict Treatment Failure in Diffuse Large B-Cell Lymphoma.

Published in:

Journal of Nuclear Medicine, 2014, v. 55, n. 12, p. 1936, doi. 10.2967/jnumed.114.145326

By:

Carr, Robert;
Fanti, Stefano;
Paez, Diana;
Cerci, Juliano;
Györke, Tamás;
Redondo, Francisca;
Morris, Tim P.;
Meneghetti, Claudio;
Auewarakul, Chirayu;
Nair, Reena;
Gorospe, Charity;
Chung, June-Key;
Kuzu, Isinsu;
Celli, Monica;
Gujral, Sumeet;
Padua, Rose Ann;
Dondi, Maurizio

Publication type:

Article

Combined PET and Biopsy Evidence of Marrow Involvement Improves Prognostic Prediction in Diffuse Large B-Cell Lymphoma.

Published in:

Journal of Nuclear Medicine, 2014, v. 55, n. 10, p. 1591, doi. 10.2967/jnumed.113.134486

By:

Cerci, Juliano J.;
Györke, Tamás;
Fanti, Stefano;
Paez, Diana;
Meneghetti, José Cláudio;
Redondo, Francisca;
Celli, Monica;
Auewarakul, Chirayu;
Rangarajan, Venkatesh;
Gujral, Sumeet;
Gorospe, Charity;
Campo, Maejoy V.;
Chung, June-Key;
Morris, Tim P.;
Dondi, Maurizio;
Carr, Robert

Publication type:

Article

How to check a simulation study.

Published in:

International Journal of Epidemiology, 2024, v. 53, n. 1, p. 1, doi. 10.1093/ije/dyad134

By:

White, Ian R;
Pham, Tra My;
Quartagno, Matteo;
Morris, Tim P

Publication type:

Article

Exploring the impact of selection bias in observational studies of COVID-19: a simulation study.

Published in:

International Journal of Epidemiology, 2023, v. 52, n. 1, p. 44, doi. 10.1093/ije/dyac221

By:

Millard, Louise A C;
Fernández-Sanlés, Alba;
Carter, Alice R;
Hughes, Rachael A;
Tilling, Kate;
Morris, Tim P;
Major-Smith, Daniel;
Griffith, Gareth J;
Clayton, Gemma L;
Kawabata, Emily;
Smith, George Davey;
Lawlor, Deborah A;
Borges, Maria Carolina

Publication type:

Article

Current Practices in Missing Data Handling for Interrupted Time Series Studies Performed on Individual-Level Data: A Scoping Review in Health Research.

Published in:

Clinical Epidemiology, 2021, v. 13, p. 603, doi. 10.2147/CLEP.S314020

By:

Bazo-Alvarez, Juan Carlos;
Morris, Tim P;
Carpenter, James R;
Petersen, Irene

Publication type:

Article

Handling Missing Values in Interrupted Time Series Analysis of Longitudinal Individual-Level Data.

Published in:

Clinical Epidemiology, 2020, v. 12, p. 1045, doi. 10.2147/CLEP.S266428

By:

Bazo-Alvarez, Juan Carlos;
Morris, Tim P;
Pham, Tra My;
Carpenter, James R;
Petersen, Irene

Publication type:

Article

Ethnic Differences in the Prevalence of Type 2 Diabetes Diagnoses in the UK: Cross-Sectional Analysis of the Health Improvement Network Primary Care Database.

Published in:

Clinical Epidemiology, 2019, v. 11, p. 1081, doi. 10.2147/CLEP.S227621

By:

Pham, Tra My;
Carpenter, James R;
Morris, Tim P;
Sharma, Manuj;
Petersen, Irene

Publication type:

Article

Health indicator recording in UK primary care electronic health records: key implications for handling missing data.

Published in:

Clinical Epidemiology, 2019, v. 11, p. 157, doi. 10.2147/CLEP.S191437

By:

Petersen, Irene;
Welch, Catherine A;
Nazareth, Irwin;
Walters, Kate;
Marston, Louise;
Morris, Richard W;
Carpenter, James R;
Morris, Tim P;
Pham, Tra My

Publication type:

Article

Speaking Stata: The joy of sets: Graphical alternatives to Euler and Venn diagrams.

Published in:

Stata Journal, 2024, v. 24, n. 2, p. 329, doi. 10.1177/1536867X241258010

By:

Cox, Nicholas J.;
Morris, Tim P.

Publication type:

Article

artcat: Sample-size calculation for an ordered categorical outcome.

Published in:

Stata Journal, 2023, v. 23, n. 1, p. 3, doi. 10.1177/1536867X231161934

By:

White, Ian R.;
Marley-Zagar, Ella;
Morris, Tim P.;
Parmar, Mahesh K. B.;
Royston, Patrick;
Babiker, Abdel G.

Publication type:

Article

Stata tip 131: Custom legends for graphs that use translucency.

Published in:

Stata Journal, 2019, v. 19, n. 3, p. 738, doi. 10.1177/1536867X19874263

By:

Morris, Tim P.

Publication type:

Article

Reference-based sensitivity analysis via multiple imputation for longitudinal trials with protocol deviation.

Published in:

Stata Journal, 2016, v. 16, n. 2, p. 443, doi. 10.1177/1536867x1601600211

By:

Cro, Suzie;
Morris, Tim P.;
Kenward, Michael G.;
Carpenter, James R.

Publication type:

Article

Quantifying the uptake of user-written commands over time.

Published in:

Stata Journal, 2016, v. 16, n. 1, p. 88, doi. 10.1177/1536867x1601600110

By:

Choodari-Oskooei, Babak;
Morris, Tim P.

Publication type:

Article

Multiple imputation of covariates by substantive-model compatible fully conditional specification.

Published in:

Stata Journal, 2015, v. 15, n. 2, p. 437, doi. 10.1177/1536867x1501500206

By:

Bartlett, Jonathan W.;
Morris, Tim P.

Publication type:

Article

Comments on 'standard and reference‐based conditional mean imputation': Regulators and trial statisticians be aware!

Published in:

Pharmaceutical Statistics, 2024, v. 23, n. 5, p. 598, doi. 10.1002/pst.2373

By:

Cro, Suzie;
Morris, Tim P.;
Roger, James H.;
Carpenter, James R.

Publication type:

Article

Sensitivity analysis for clinical trials with missing continuous outcome data using controlled multiple imputation: A practical guide.

Published in:

2020

By:

Cro, Suzie;
Morris, Tim P.;
Kenward, Michael G.;
Carpenter, James R.

Publication type:

journal article

One-stage individual participant data meta-analysis models for continuous and binary outcomes: Comparison of treatment coding options and estimation methods.

Published in:

2020

By:

Riley, Richard D.;
Legha, Amardeep;
Jackson, Dan;
Morris, Tim P.;
Ensor, Joie;
Snell, Kym I.E.;
White, Ian R.;
Burke, Danielle L.

Publication type:

journal article

Using simulation studies to evaluate statistical methods.

Published in:

2019

By:

Morris, Tim P.;
White, Ian R.;
Crowther, Michael J.

Publication type:

journal article

Population-calibrated multiple imputation for a binary/categorical covariate in categorical regression models.

Published in:

2019

By:

Pham, Tra My;
Carpenter, James R;
Morris, Tim P;
Wood, Angela M;
Petersen, Irene

Publication type:

journal article

Individual participant data meta-analysis of continuous outcomes: A comparison of approaches for specifying and estimating one-stage models.

Published in:

2018

By:

Legha, Amardeep;
Riley, Richard D.;
Ensor, Joie;
Snell, Kym I.E.;
Morris, Tim P.;
Burke, Danielle L.

Publication type:

journal article

Multiple imputation in Cox regression when there are time-varying effects of covariates.

Published in:

2018

By:

Keogh, Ruth H.;
Morris, Tim P.

Publication type:

journal article

Meta-analysis of Gaussian individual patient data: Two-stage or not two-stage?

Published in:

2018

By:

Morris, Tim P.;
Fisher, David J.;
Kenward, Michael G.;
Carpenter, James R.

Publication type:

journal article

Combining fractional polynomial model building with multiple imputation.

Published in:

2015

By:

Morris, Tim P.;
White, Ian R.;
Carpenter, James R.;
Stanworth, Simon J.;
Royston, Patrick

Publication type:

journal article

A note regarding 'random effects' - authors' response.

Published in:

2014

By:

Kahan, Brennan C.;
Morris, Tim P.

Publication type:

Other

Multiple imputation for an incomplete covariate that is a ratio.

Published in:

Statistics in Medicine, 2014, v. 33, n. 1, p. 88, doi. 10.1002/sim.5935

By:

Morris, Tim P.;
White, Ian R.;
Royston, Patrick;
Seaman, Shaun R.;
Wood, Angela M.

Publication type:

Article

Analysis of multicentre trials with continuous outcomes: when and how should we account for centre effects?

Published in:

2013

By:

Kahan, Brennan C;
Morris, Tim P

Publication type:

journal article

Analysis of multicentre trials with continuous outcomes: when and how should we account for centre effects? Analysis of multicentre trials with continuous outcomes: when and how should we account for centre effects?

Published in:

Statistics in Medicine, 2013, v. 32, n. 7, p. 1136, doi. 10.1002/sim.5667

By:

Kahan, Brennan C.;
Morris, Tim P.

Publication type:

Article

Improper analysis of trials randomised using stratified blocks or minimisation.

Published in:

Statistics in Medicine, 2012, v. 31, n. 4, p. 328, doi. 10.1002/sim.4431

By:

Kahan, Brennan C.;
Morris, Tim P.

Publication type:

Article

A comparison of methods to adjust for continuous covariates in the analysis of randomised trials.

Published in:

2016

By:

Kahan, Brennan C.;
Rushton, Helen;
Morris, Tim P.;
Daniel, Rhian M.

Publication type:

journal article

A re-randomisation design for clinical trials.

Published in:

2015

By:

Kahan, Brennan C.;
Forbes, Andrew B.;
Doré, Caroline J.;
Morris, Tim P.

Publication type:

journal article

Tuning multiple imputation by predictive mean matching and local residual draws.

Published in:

BMC Medical Research Methodology, 2014, v. 14, n. 1, p. 1, doi. 10.1186/1471-2288-14-75

By:

Morris, Tim P.;
White, Ian R.;
Royston, Patrick

Publication type:

Article

Choosing sensitivity analyses for randomised trials: principles.

Published in:

BMC Medical Research Methodology, 2014, v. 14, n. 1, p. 1, doi. 10.1186/1471-2288-14-11

By:

Morris, Tim P.;
Kahan, Brennan C.;
White, Ian R.

Publication type:

Article

Choosing sensitivity analyses for randomised trials: principles.

Published in:

2014

By:

Morris, Tim P;
Kahan, Brennan C;
White, Ian R

Publication type:

journal article

Tuning multiple imputation by predictive mean matching and local residual draws.

Published in:

2014

By:

Morris, Tim P;
White, Ian R;
Royston, Patrick

Publication type:

journal article

Adjusting for multiple prognostic factors in the analysis of randomised trials.

Published in:

BMC Medical Research Methodology, 2013, v. 13, n. 1, p. 1, doi. 10.1186/1471-2288-13-99

By:

Kahan, Brennan C.;
Morris, Tim P.

Publication type:

Article

Assessing potential sources of clustering in individually randomised trials.

Published in:

BMC Medical Research Methodology, 2013, v. 13, n. 1, p. 1, doi. 10.1186/1471-2288-13-58

By:

Kahan, Brennan C.;
Morris, Tim P.

Publication type:

Article

Assessing potential sources of clustering in individually randomised trials.

Published in:

2013

By:

Kahan, Brennan C;
Morris, Tim P

Publication type:

journal article

Adjusting for multiple prognostic factors in the analysis of randomised trials.

Published in:

2013

By:

Kahan, Brennan C;
Morris, Tim P

Publication type:

journal article

Involving patients and the public In sTatistIcal Analysis pLans (INITIAL): A delphi survey.

Published in:

PLoS ONE, 2023, v. 18, n. 12, p. 1, doi. 10.1371/journal.pone.0292257

By:

Goulão, Beatriz;
Morris, Tim P.;
Blazeby, Jane;
Gamble, Carrol;
Gillies, Katie;
Laidlaw, Lynn;
Ramsay, Craig;
Soulsby, Irene;
Stewart, Derek;
Totton, Nikki

Publication type:

Article

The Hazards of Period Specific and Weighted Hazard Ratios.

Published in:

2020

By:

Bartlett, Jonathan W.;
Morris, Tim P.;
Stensrud, Mats J.;
Daniel, Rhian M.;
Vansteelandt, Stijn K.;
Burman, Carl-Fredrik

Publication type:

Letter

Accounting for bias due to outcome data missing not at random: comparison and illustration of two approaches to probabilistic bias analysis: a simulation study.

Published in:

BMC Medical Research Methodology, 2024, v. 24, n. 1, p. 1, doi. 10.1186/s12874-024-02382-4

By:

Kawabata, Emily;
Major-Smith, Daniel;
Clayton, Gemma L.;
Shapland, Chin Yang;
Morris, Tim P.;
Carter, Alice R.;
Fernández-Sanlés, Alba;
Borges, Maria Carolina;
Tilling, Kate;
Griffith, Gareth J.;
Millard, Louise A. C.;
Smith, George Davey;
Lawlor, Deborah A.;
Hughes, Rachael A.

Publication type:

Article