SAS is a tool that can be used to analyze data sets. If you have a data set on, for example, physical therapy patients, their treatment, treatment times, treatment durations, and other such information and you wanted to, continuing the example, see if treatment A resulted in a different outcome for patients than treatment B, you might be able to do that.
Unfortunately, there is no
PROC REHAB data = knee;
run;
that can be used.