Mind the Gap: The Prospects of Missing Data

BACKGROUND: The increasing use of workplace-based assessments (WBAs) in competency-based medical education has led to large data sets that assess resident performance longitudinally. With large data sets, problems that arise from missing data are increasingly likely. OBJECTIVE: The purpose of this study is to examine (1) whether data are missing at random across various WBAs, and (2) the relationship between resident performance and the …