Re: [R] case-cohort

From: Terry Therneau <>
Date: Thu, 12 Jun 2008 10:27:07 -0500 (CDT)

Jin Wang had an error. My original note specified a variable that was 1 for subjects NOT in the subcohort, so the correct coxph call is

  coxph(Surv(edrel, rel) ~ stage + histol + age +

           offset(-100*(subcohort==0)) + cluster(seqno), data            

This gives the same coefficients as the cch example, along with the infinitesimal jackknife or "robust" variance estimate.

        Terry Therneau mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Thu 12 Jun 2008 - 16:05:06 GMT

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