4、Case-Control Study(3)

“A primary goal is to reach the same conclusions in a retrospective (casecontrol) study as would have obtained from a forward (cohort) study, if one had been done.”Source: Mantel, N, Haenszel,W. Statistical aspects of the analysis of data from retrospective studies of disease. J Natl Cancer Inst. 1959; 22:719-48

Example of the Ideal Design

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