Yimei LiSummaryAffiliation: University of Pennsylvania Country: USA Publications
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Modeling smoking cessation data with alternating states and a cure fraction using frailty modelsYimei Li
Department of Biostatistics and Epidemiology, University of Pennsylvania, Philadelphia, PA 19104 6021, USA
Stat Med 29:627-38. 2010..A simulation study suggests that the estimates have little bias and that their 95 per cent confidence intervals have nearly nominal coverage in samples of practical size...- Prediction of individual long-term outcomes in smoking cessation trials using frailty modelsYimei Li
Division of Oncology, The Children s Hospital of Philadelphia and University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
Biometrics 67:1321-9. 2011..Comparisons of actual smoking status at one year with predictions from our model and from a variety of empirical methods suggest that our method gives excellent predictions... 
Statistical analysis of daily smoking status in smoking cessation clinical trialsYimei Li
Division of Oncology, The Children s Hospital of Philadelphia and Department of Biostatistics and Epidemiology, University of Pennsylvania, Philadelphia, PA 19104, USA
Addiction 106:2039-46. 2011..We present an alternative approach that analyzes the entire sequence of daily smoking status observations...- Assessing the fit of parametric cure modelsE Paul Wileyto
Department of Biostatistics and Epidemiology, University of Pennsylvania, Philadelphia, PA 19104, USA
Biostatistics 14:340-50. 2013..We derive the asymptotic distribution of the residuals and evaluate their performance by simulation in a range of parametric models. We apply our approach to data from a smoking cessation drug trial... - A Bayesian approach for unplanned sample sizes in phase II cancer clinical trialsYimei Li
Division of Oncology, The Children s Hospital of Philadelphia, PA 19104, USA
Clin Trials 9:293-302. 2012..The requirement to examine the outcome at a prespecified sample size (SS) can be problematic, because the attained SS often differs from the planned SS...