doi: 10.1093/oxfordjournals.aje.a112395.
Determination of significant relative risks and optimal sampling procedures in prospective and retrospective comparative studies of various sizes
- PMID: 848486
- DOI: 10.1093/oxfordjournals.aje.a112395
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Determination of significant relative risks and optimal sampling procedures in prospective and retrospective comparative studies of various sizes
Am J Epidemiol.
1977 Apr.
Abstract
Methods are given for determining the relative risks which it is possible to demonstrate as statistically significant with given probability in prospective and retrospective studies of a particular size. Also considered is the ratio of the sample sizes in the two groups being compared which will provide the most precise estimate of relative risk for a given total sample size.
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