| To: | <s-news@lists.biostat.wustl.edu> |
|---|---|
| Subject: | FW: group covariates in coxph with a frailty term? |
| From: | "Hunsicker, Lawrence" <lawrence-hunsicker@uiowa.edu> |
| Date: | Fri, 22 Aug 2008 10:08:14 -0500 |
| Thread-index: | AckEXnNS5a4AurSpRtutenI250r3YwACmmAg |
| Thread-topic: | [S] group covariates in coxph with a frailty term? |
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From: Hunsicker, Lawrence Good morning, folks: I would like to run a cox mixed model in which there are both individual covariates and group covariates. When one is running a mixed linear model, one includes the group covariates in the specification of the random effects. But so far as I can see, there is no way to do this with the “frailty” term in the coxph function. What is the correct way to enter group covariates in the coxph model? Many thanks in advance for your help or advice. Larry Hunsicker
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