Hi,   I am trying to create a time variable that has the maximum follow up time for each patient. Each patient has 6 different stratums (stratum 1, 2, 3, 4, 5, 6). Within each stratum are different times when a different event of interest occurs. Stratum 6 has the longest follow up time. Other than deleting stratums 1-5 and just using stratum 6, is there a way program so that it will select for the highest number for each stratum? Like function like Max or etc?   Thanks for all of your help ... View more