10-30-2015 05:30 AM
I'm working with 2 cohorts, 1 cohort followed between 2007 and 2010 and 1 cohort followed between 2010 and 2013.
How can I test the difference between the 2 cumulative incidence curves obtained with 2 different Fine Gray models (SAS pshreg macro) ? I know this can be done with the cuminc function in the R package cmprsk but I would like to be able to do this in SAS.
Since these are 2 independent populations, I dont think that fitting a unique model and testing the effect of a dichotomous covariate "cohort1 or cohort2" would be correct.
Thanks for your help