THE EXPOSURE ODDS RATIO IN NESTED CASE-CONTROL STUDIES WITH COMPETING RISKS

摘要: Abstract A nested case-control study, also known as an ambidirectional is a study within cohort study. Although distortion by competing risks well-recognized in follow-up studies, the problem has not been widely appreciated studies. This paper extends previous work concerning bias associated with for Specifically, distorting effect of illustrated three methods control selection. Assuming proportional hazards model, authors derived formulas odds ratio when cannot be ignored. Examples illustrate magnitude that occurs exposure interest causes death or withdrawal.