Programming the statistical procedures from SAS

Mixed effects survival model

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Mixed effects survival model

 

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!

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