Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Summary of effect sizes for different approaches to power calculations (a,b)
| Method | Effect size (Δ/σ) |
|---|---|
| (a) Two-group endpoint differences | 0.48 |
| (b) Two-group endpoint differences, different r | 0.37–0.48 |
| (c) MANOVA (two groups, r=0.5, 0.6, 0.7) | 0.54, 0.48, 0.42 |
Endpoint differences under different assumptions about the correlation between baseline and endpoint mean values of the outcomes (r) and (c) MANOVA under different scenarios regarding r.
MANOVA, multivariate analysis of variance.
