Skip to main content

Table 2 Summary of six trials considered for simulation with β = 0.10 and a one-sided α = 0.025

From: Interim analysis for binary outcome trials with a long fixed follow-up time and repeated outcome assessments at pre-specified times

Standard group event proportion (π0)

Experimental group event proportion (π1)

Absolute risk reduction (π0-π1)

N

0.30

0.25

0.05

3342

0.30

0.20

0.10

796

0.30

0.10

0.20

160

0.50

0.45

0.05

4182

0.50

0.40

0.10

1030

0.50

0.30

0.20

242