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14 results

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CERAD practice effects and attrition bias in a dementia prevention trial.
Mathews M, Abner E, Caban-Holt A, Kryscio R, Schmitt F. Mathews M, et al. Int Psychogeriatr. 2013 Jul;25(7):1115-23. doi: 10.1017/S1041610213000367. Epub 2013 Apr 10. Int Psychogeriatr. 2013. PMID: 23570673 Free PMC article.
BACKGROUND: The Consortium to Establish a Registry for Alzheimer's Disease (CERAD) set of tests is frequently used for tracking cognition longitudinally in both clinical and research settings. Repeated cognitive assessments are an important component in measuring such chan …
BACKGROUND: The Consortium to Establish a Registry for Alzheimer's Disease (CERAD) set of tests is frequently used for tracking cognition lo …
Posttreatment attrition and its predictors, attrition bias, and treatment efficacy of the anxiety online programs.
Al-Asadi AM, Klein B, Meyer D. Al-Asadi AM, et al. J Med Internet Res. 2014 Oct 14;16(10):e232. doi: 10.2196/jmir.3513. J Med Internet Res. 2014. PMID: 25316533 Free PMC article.
CONCLUSIONS: Results identified predictors of posttreatment assessment completers and provided further support for the efficacy of self-help online treatment programs for the 5 anxiety disorders. TRIAL REGISTRATION: Australian and New Zealand Clinical Trials Registr …
CONCLUSIONS: Results identified predictors of posttreatment assessment completers and provided further support for the efficacy of self-help …
Attrition Bias Related to Missing Outcome Data: A Longitudinal Simulation Study.
Lewin A, Brondeel R, Benmarhnia T, Thomas F, Chaix B. Lewin A, et al. Epidemiology. 2018 Jan;29(1):87-95. doi: 10.1097/EDE.0000000000000755. Epidemiology. 2018. PMID: 28926372
Second, simulating additional missing data in BMI at follow-up under various missing-at-random scenarios, we quantified the impact of attrition and assessed how multiple imputation performed compared to complete case analysis and to a perfectly specified IPW model as a gol …
Second, simulating additional missing data in BMI at follow-up under various missing-at-random scenarios, we quantified the impact of …
Smoking hot joint models for attrition bias-XMAR-ks the spot.
Griswold ME, Varadhan R. Griswold ME, et al. Am J Epidemiol. 2026 Jun 3;195(6):1651-1658. doi: 10.1093/aje/kwag063. Am J Epidemiol. 2026. PMID: 42020343 Free PMC article.
We describe the nature of the "extended missing at random" (XMAR) assumption of the Joint Model, position the XMAR assumption in an expanded four-level missingness taxonomy, and illustrate a sequential sensitivity analysis using example data on smoking and cognitive declin …
We describe the nature of the "extended missing at random" (XMAR) assumption of the Joint Model, position the XMAR assumption in an e …
Recruitment and retention strategies and the examination of attrition bias in a randomised controlled trial in children's centres serving families in disadvantaged areas of England.
Hindmarch P, Hawkins A, McColl E, Hayes M, Majsak-Newman G, Ablewhite J, Deave T, Kendrick D; Keeping Children Safe study group. Hindmarch P, et al. Trials. 2015 Mar 7;16:79. doi: 10.1186/s13063-015-0578-4. Trials. 2015. PMID: 25886131 Free PMC article.
METHODS: Thirty-six children's centres were cluster randomised into one of three arms of a 12-month fire-related injury prevention trial. Two arms delivered safety interventions and there was one control arm. ...Parent retention was 68% at 12 months, ranging from 65 …
METHODS: Thirty-six children's centres were cluster randomised into one of three arms of a 12-month fire-related injury prevention …
Minimizing attrition bias: a longitudinal study of depressive symptoms in an elderly cohort.
Chang CC, Yang HC, Tang G, Ganguli M. Chang CC, et al. Int Psychogeriatr. 2009 Oct;21(5):869-78. doi: 10.1017/S104161020900876X. Epub 2009 Mar 17. Int Psychogeriatr. 2009. PMID: 19288971 Free PMC article.
The first analytic model (generalized mixed model) treated non-response as data missing at random. The other two models used shared parameter methods; each had different specifications for dropout but both jointly modeled both outcome and dropout through a common random …
The first analytic model (generalized mixed model) treated non-response as data missing at random. The other two models used shared p …
[Introduction to randomized trials: attrition bias].
Simon EG, Fouché CJ, Perrotin F. Simon EG, et al. Gynecol Obstet Fertil. 2012 Jan;40(1):64-5. doi: 10.1016/j.gyobfe.2011.08.005. Epub 2011 Dec 20. Gynecol Obstet Fertil. 2012. PMID: 22192692 French. No abstract available.
Interpreting trial results following use of different intention-to-treat approaches for preventing attrition bias: a meta-epidemiological study protocol.
Dossing A, Tarp S, Furst DE, Gluud C, Beyene J, Hansen BB, Bliddal H, Christensen R. Dossing A, et al. BMJ Open. 2014 Sep 26;4(9):e005297. doi: 10.1136/bmjopen-2014-005297. BMJ Open. 2014. PMID: 25260368 Free PMC article.
INTRODUCTION: When participants drop out of randomised clinical trials, as frequently happens, the intention-to-treat (ITT) principle does not apply, potentially leading to attrition bias. ...METHODS AND ANALYSIS: Using meta-epidemiology on randomised trials …
INTRODUCTION: When participants drop out of randomised clinical trials, as frequently happens, the intention-to-treat (ITT) pr …
A practical approach to adjusting for attrition bias in HIV clinical trials with serial marker responses.
Cozzi Lepri A, Smith GD, Mocroft A, Sabin CA, Morris RW, Phillips AN. Cozzi Lepri A, et al. AIDS. 1998 Jul 9;12(10):1155-61. doi: 10.1097/00002030-199810000-00007. AIDS. 1998. PMID: 9677164
OBJECTIVES: To illustrate a simple approach to adjusting for bias due to drop-outs (i.e., attrition bias) when evaluating the effect of a certain therapy in HIV clinical trials using the mean change in plasma viral load. To evaluate its validity and to compare its performa …
OBJECTIVES: To illustrate a simple approach to adjusting for bias due to drop-outs (i.e., attrition bias) when evaluating the effect of a ce …
14 results