Royston, Patrick; Babiker, Abdel - In: Stata Journal 2 (2002) 2, pp. 151-163
We present a menu-driven Stata program for the calculation of sample size or power for complex clinical trials with a survival time or a binary outcome. The features supported include up to six treatment arms, an arbitrary time-to- event distribution, fixed or time-varying hazard ratios, unequal...