Go to SWOG Web site

Interaction Survival
Sample size

Power

1 Sided

2 Sided

Alpha
Accrual  Follow  Comp Risk
Cell Freq Treat1/Strat1 Cell Freq Treat1/Strat2
 Cell Freq Treat2/Strat1 Cell Freq Treat2/Strat2
Hazard Rate Treat1/Strat1 Hazard Rate Treat1/Strat2
Haz Ratio T1/T2 Strat1 Haz Ratio T1/T2 Strat2
                Power               Sample size

                 Help Document