02-04-2015 03:44 AM
I need to calculate sample size for survival analysis with 5 groups. Is it possible to do it in any procedures?
There is "twosamplesurvival" statement in PROC POWER for two groups, I think I can to use alpha level with a Bonferroni correction (0.05/5), but it will be so conservative and maybe there is another way for solving the problem?
Many thanks in advance!