Case Control Study Power Calculator. Jul 24 2019 About This Calculator This calculator uses a number of different equations to determine the minimum number of subjects that need to be enrolled in a study in order to have sufficient statistical power to detect a treatment effect. Dec 13 2019 Select Unmatched Case-Control.
Contingency table involving small numbers and the Χ 2 test. Journal of the Royal Statistical Society Supplement 1. This utility calculates the sample size required for a case-control study with specified levels of confidence and power and case and control groups of equal size.
Journal of the Royal Statistical Society Supplement 1.
The power of a study like this depends mainly upon the number of such sets ie. Journal of Clinical Epidemiology 44. Say sample size calculations for a case-control study return 16 observations in each group but you only have 12 cases. The formulas are extended from one control per case to F controls per case and adjusted for a potential multi-category confounder in unmatched.
