Two Arm Survival

Two Arm Survival is a program to calculate either estimates accrual or power for differences in survival times between two groups. The program allows for unequal sample size allocation between the two groups. The survival time estimates also allow for multiple strata or risk groups.

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User Input
Program Output

Select Parameters

Type Calculation

Type Input


Sided


Number Strata
Proportion in Standard Group
Alpha
Years of Accrual
Years of Follow-up
Accrual Rate
Hazard Ratio
Power

Stratum Proportion Hazard Rate, Std. Hazard Rate, Exp. Hazard Ratio Proportion Surviving, Std. Proportion Surviving, Std. Survival Time, Std. Proportion Surviving, Exp. Proportion Surviving, Exp. Proportion Surviving, Exp. Survival Time, Exp. Survival Time, Exp. Median Survival, Std. Median Survival, Exp.

Accrual Rate
Power
Total Accrual