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Jul 9, 2024 | 
analyticalsciencejournals.onlinelibrary.wiley.com | Steven Karamatic |Tim Morris |Paul Zahra |Stuart Paine
Corresponding Author Steven Karamatic Greyhound Racing Victoria, West Melbourne, Victoria, Australia Correspondence Steven Karamatic, Greyhound Racing Victoria, 46-50 Chetwynd Street, West Melbourne, Victoria 3003, Australia. Email: [email protected] for more papers by this author
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Apr 30, 2024 | 
dialnet.unirioja.es | Ian White |Tim Morris |Patrick Royston |Ella Marley Zagar
artcat: Sample-size calculation for an ordered categorical outcomeAutores: Ian R. White, Ella Marley Zagar, Tim P. Morris, Mahesh K. B. Parmar, Patrick Royston, Abdel G. BabikerLocalización: The Stata journal, ISSN 1536-867X, Vol. 23, Nº. 1, 2023, págs.
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Apr 17, 2024 | 
onlinelibrary.wiley.com | Suzie Cro |Tim Morris |James Roger |James Carpenter
REFERENCES 1, , , , , . Standard and reference-based conditional mean imputation. Pharm Stat. 2022; 21(6): 1246-1257. doi:10.1002/pst.2234 2, , . Analysis of longitudinal trials with protocol deviation: a framework for relevant, accessible assumptions and inference via multiple imputation. J Biopharm Stat. 2013; 23(6): 1352-1371. 3. Multiple-imputation inferences with uncongenial sources of input. Stat Sci. 1994; 9(4): 538-558. 4, .
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Apr 17, 2024 | 
onlinelibrary.wiley.com | Suzie Cro |Tim Morris |James Roger |James Carpenter
Accurate frequentist performance of a method is desirable in confirmatory clinical trials, but is not sufficient on its own to justify the use of a missing data method.
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Apr 9, 2024 | 
nature.com | Michelle Spano |Tim Morris |Neil Davies
AbstractRisk behaviours are common in adolescent and persist into adulthood, people who engage in more risk behaviours are more likely to have lower educational attainment. We applied genetic causal inference methods to explore the causal relationship between adolescent risk behaviours and educational achievement. Risk behaviours were phenotypically associated with educational achievement at age 16 after adjusting for confounders (−0.11, 95%CI: −0.11, −0.09).
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Mar 8, 2024 | 
medrxiv.org | Liam Wright |Gemma Shireby |Tim Morris |Neil Davies
The authors have declared no competing interest. The funders had no final role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the paper for publication. All researchers listed as authors are independent from the funders and all final decisions about the research were taken by the investigators and were unrestricted.
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Feb 6, 2024 | 
bmj.com | Tim Morris |Suzie Cro
Dear EditorWe would like to thank Dr Blond for giving us the opportunity to further clarify this important point. As mentioned in our original reply, the “total effect” can be used to refer to different effects, depending on how it is defined.
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Jan 31, 2024 | 
bmj.com | Tim Morris |Suzie Cro
Dear EditorWe thank Dr Blond for their interest in our article. Our statement that a treatment policy strategy cannot be used to handle truncating events is consistent with the estimands defined in the Young et al paper, which considers a number of estimands in the presence of competing events, but does not consider a treatment policy strategy (which, as described in our paper, cannot be defined in the presence of competing events). Young et al.
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Jan 23, 2024 | 
bmj.com | Brennan C. Kahan |Tim Morris |Suzie Cro
Brennan C Kahan, principal research fellow1, Tim P Morris, principal research fellow1, Suzie Cro, senior lecturer2 1MRC Clinical Trials Unit at UCL, University College London, London, UK 2Imperial Clinical Trials Unit, School of Public Health, Imperial College London, London, UK Estimands help researchers to pinpoint their exact research question, say Brennan C Kahan and colleagues Many researchers, like ourselves, will remember being taught to select a study’s analysis method based on the...
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Jan 9, 2024 | 
nature.com | Karri Silventoinen |Tim Morris |George Smith
AbstractHigher mean body mass index (BMI) among lower socioeconomic position (SEP) groups is well established in Western societies, but the influence of genetic factors on these differences is not well characterized.
