Combining Matched and Unmatched Control Groups in Case-Control Studies (2008)
Cessie, Saskia Le, Nagelkerke, Nico, Rosendaal, Frits R., Van Stralen, Karlijn J., Pomp, Elisabeth R., Van Houwelingen, Hans C.
Multiple control groups in case-control studies are used to control for different sources of confounding. For example, cases can be contrasted with matched controls to adjust for multiple genetic or...