02-13-2018 02:39 AM
The data has a 3-level clustered structure: first cluster level is A (e.g. student), second level B(e.g. class), third level C (e.g. school), and a student may have multiple events(recurrent). I wonder if any SAS proc could do a recurrent event survival analysis with 3-level clustered data?
In addition, there are more than 2 time dependent covariates (i.e. may change during the time interval from the start date to an event date), I wonder if there is an instruction or example how to deal with more than 2 time dependent covariates in a survival model?
Any help would be much appreciated!