Fig. 1From: Non-inferiority test for a continuous variable with a flexible margin in an active controlled trial: an application to the “Stratall ANRS 12110 / ESTHER” trialType I error rate estimates according to sample sizes for test statistic based test. Type I error rate estimates as function of reference treatment, for the test statistic based test from the left to the rigth, sample sizes are nN=nR=20, 100, and 1000 respectivelyBack to article page