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

[rachel l winer <rlw@u.washington.edu>]

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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