Zeger the johns hopkins university, department of biostatistics, baltimore,.
Pair case control study. Web sample size determination in studies with matched pairs. Web this study aimed to analyze associations between several hereditary and environmental predictors and the development of keratoconus. While matching is intended to eliminate confounding, the main potential.
In an observational study, to investigate the treatment effect, one common strategy is to match the control subjects to the treated subjects. This function gives you the minimum sample size. Two modifications are made in schlesselman's procedure for determining the total number of pairs to be studied in a.
We shall be concerned with matched.