Fig. 1From: Correction to: Optimality criteria for futility stopping boundaries for group sequential designs with a continuous endpointThe “optimal” futility boundary α0,opt as a function of the admissible parameters Powloss and πwrong for N = 140 (blue dots) and n = 188 (red squares). The black symbols highlight the “optimal” futility boundaries for Powloss = 0.05 and πwrong = 0.05Back to article page