Web sample size determination in studies with matched pairs.
Pair case control study. Web this study aimed to analyze associations between several hereditary and environmental predictors and the development of keratoconus. We shall be concerned with matched. Zeger the johns hopkins university, department of biostatistics, baltimore,.
This function gives you the minimum sample size. Introduction in epidemiology, matching is often used to control for confounding which may result from the use of observational data. While matching is intended to eliminate confounding, the main potential.
Web pairs of cases and controls matched 1:1 on defined characteristics are evaluated for exposure to a risk factor and distributed into the four cells of the table representing the.