Royston and Babiker (2002) presented a menu-driven Stata program for the calculation of sample size or power for complex clinical trial designs under a survival time or binary outcome. In the present article, the package is updated to Stata 8 under the new name ART. Furthermore, the program has been extended to incorporate noninferiority designs and provides more detailed output. This package is the only realistic sample size tool for survival studies available in Stata.
BarthelF. M.-S., BabikerA., RoystonP., and ParmarM. K. B.2005. Evaluation of sample size and power for multiarm survival trials allowing for nonproportional hazards, loss to follow-up and crossover. Statistics in Medicine submitted.
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RoystonP., and BabikerA.2002. A menu-driven facility for complex sample size calculation in randomized controlled trials with a survival or a binary outcome. Stata Journal2(2): 151–163.
