POWER Procedure

You can now parameterize computations for survival analysis in terms of the expected number of events, in addition to sample size. See the EVENTSPERGROUP=, EVENTSTOTAL=, and GROUPEVENTS= options in the TWOSAMPLESURVIVAL statement. Parameterization in terms of sample size accrued per unit time is also available in this statement with the ACCRUALRATEPERGROUP=, ACCRUALRATETOTAL=, and GROUPACCRUALRATES= options.