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.

User Input
Program Output

Select Calculation, Test type and Parameter of Interest

Sample Size
Power
1 Sided
2 Sided
Median Survival
Survival Probabilitiy

Select Study and Hypothesis Test Parameters

Accrual Time
Follow-up Time
Alpha

Null Median Survival Alt Median Survival
Null Survival Prob Alt Survival Prob At Time

Power
Sample Size
Approx Lower Critical Value
Approx Upper Critical Value