@nic_perry wrote:
Im running a survival analysis and I have a variable 'age' where the data ranges from 30-90 years old but how do I cut it off and make it so the survival probability graph will only include up to the age of 60? Also how might I group them in categories of say 30-50 years, 50-70 years, and 70-90 years?
proc lifetest data=lungcancer plots=survival(atrisk);
time survival*status(0);
strata age / test=logrank;
run;
Are you just asking to change the set of STRATA you ask it to use?
Are there implications about censoring if you truncate AGE at 60? In other words if there is a data point with an age of 65 and a survival of 10 years does that mean that 5 of those years was after age 60? Do you want to censor that survival time to just the 5 years to correspond to truncating the age at 60?
... View more