- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content
Posted 07-22-2021 01:25 PM
(695 views)
Hi Everyone,
I am running a cause specific hazards regression model and my model currently violates the proportional hazards assumption for my independent variable "case" (checked by both looking at Schoenfeld residuals and the supremum test)
proc phreg data=work.MACE covs(aggregate);
class case (ref='0') income (ref='1') rurality (ref='0');
model time*event (0,2) = case income rurality/ RL ties=efron;
id patientgroup;
run;
My understanding for when the PH assumption is violated, is that I can choose to add a time interaction term for my variable case, to understand where the hazard ratio deviates/changes.
I have seen papers that graphically demonstrate how the adjusted hazard ratio changes as a function of time.
Does anyone have any advice on how I can demonstrate and program this?
Thank you!
1 REPLY 1
- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content
Try re-posting under menu --> Analytics -> Statistical Procedures