English to Chinese Science Mathematics & Statistics

Using a non inferiority margin derived from meta analysis of AAA versus BBB (hazard ratio=0.XX), this trial was sized to have {75% power }in order to demonstrate non inferiority (1 sided 20% significance level) for the comparison of AAA versus CCC. Also, this trial was sized to have {75% power }in order to detect a 30% reduction in progression rate for AAA in relation to BBB (ie, hazard ratio of 70%), with a 1 sided 20% significance level.