Power and Sample Size Requirements, Case-Control Studies
Use EpiTable | Sample | Power calculation | Case-Control to perform
power calculations for case-control studies. This program prompts the user
for:
-
the number of cases (m1),
-
the ratio of controls per case (m2 / m1),
-
the OR "worth detecting",
-
the expected exposure proportion among controls (p2),
and
-
the alpha level of the test (default = .05).
Calculations are based on formulas in Fleiss (1981, pp. 44 - 45).
Use EpiTable | Sample | Sample Size | Case-Control to calculate
sample size requirements for case-control studies.