Mixed effects cox regression models are used to model survival data when there are repeated measures on an individual, individuals nested within some other hierarchy, or some other reason to have both fixed and random effects.
Think about some good Google search terms, like:
- mixed effects cox regression
- Cox Regression repeated measures
- Cox Regression time-varying covariates
Then enter these terms in a Google search bar with the "site:" parameter
- site:documentation.sas.com
- site:support.sas.com
- site:blogs.sas.com
- site:communities.sas.com
- site:lexjansen.com
SAS Tip: Learn lexjansen.com
https://communities.sas.com/t5/SAS-Tips-from-the-Community/SAS-Tip-Learn-lexjansen-com/td-p/436336
I am sure you will get some good hits!
BR, Koen