Case-Control Studies PowerPoint PPT Presentation. By liam; 4092 SlideShows; cases in a case-control study are not a random sample of all cases in the population.
Overmatching bias and confounding variables. matching is one way to identify causality in observational studies. By matching case-control matching is
Statistics notes: Matching; General Practice Statistics notes: Matching BMJ 1994; This happens in epidemiological case-control studies,