Power -- Survival Outcomes

Proportional hazards case

Sample size in treated group

Sample size in control group

Control event rate

Hazard ratio, treated vs control

Number equal length study periods 

Type of patient entry  

Number study periods for uniform patient entry

Two-sided Type I error

Test statistic

List loss to follow-up rates for each period

List rates of crossover to treated for each period

List rates of crossover to control for each period