Complete (or balanced) repeated measures data arise when all subjects in a study are measured at the same set of time points. Data are often incomplete, because measurements are missed, or the design of the study results in subjects being measured at different sets of time points. This article reviews methods of analysis for incomplete… Continue reading Incomplete data in repeated measures analysis

Background Self-report studies of widespread use of routine prostate-specific antigen (PSA) testing have fueled concerns about overuse and possible harm. The purpose of this study was to examine use of PSA testing during physician office visits in a national sample of prostate-cancer−free men ages 40 years and older. Methods Bivariate and multivariate logistic regression models… Continue reading PSA Testing in Office-Based Clinics: Are We Testing As Much As We Think?