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st: Stcox:estimating standard error for a category with zero events


From   rachel l winer <rlw@u.washington.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: Stcox:estimating standard error for a category with zero events
Date   Fri, 23 Sep 2005 12:13:36 -0700 (PDT)

Hi,
I am using Stcox to estimate the hazard ratio for a dichotomous variable, where one category has zero events. The model does not converge, and therefore there is no standard error, p-value, or confidence interval. Is there any way to get a standard error or p-value using Stcox when there is a category with zero events?
Thanks,
Rachel
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