Fig. 5From: Optimal futility stopping boundaries for binary endpointsPower for \(p_a-p_0 = 0.15\), \(\alpha = 0.05\) and \(\beta = 0.2\). Only on a few occasions, a power loss below 80% can be observed. This loss is always within the boundaries of the predefined admissible power loss \(Pow_{loss}\)Back to article page