One Arm Nonparametric Survival
One Arm Survival is an interactive program for calculating either estimates of accrual or power for null and alternative survival functions
based on either design specifications of survival probability or median survival.
The test statistic for survival probability is assumed to be based on the non-parametric estimate of the survival distribution.
For median survival, a Brookmeyer-Crowley like test assumed.
The program also gives large sample expected critical values for median survival (using Brookmeyer-Crowley) or survival probabilities.