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.

For further details, view the Help Document.

User Input

Program Output

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