st: subpopulation weights with stcox

[Lisa Marie Yarnell <lisa.yarnell@utexas.edu>]

Hi all, I am having some trouble requesting robust standard errors to
account for the survey nature of my data, and in particular, the use
of subpopulation weights (males and females).  I can run the models
without weights, but when I try to apply weights, Stata tells me that
my error type for the variance-covariance matrix is incorrect.  Yet
when I try to request robust standard errors, Stata does not allow it.
 See below.  Does anyone know how to request robust standard errors
for subpopulation Cox regressons in Stata?

Thank you, Lisa


. svy(male): stcox rrisk1_t
invalid vcetype
r(198);

. svy(male): stcox rrisk1_t, vce(robust)
option vce() of stcox is not allowed with the svy prefix
r(198);

. svy: stcox rrisk1_t, vce(robust)
option vce() of stcox is not allowed with the svy prefix
r(198);


-- 
Lisa M. Yarnell, Ph.D.
Postdoctoral Research Associate
Department of Psychology
University of Southern California
3620 McClintock Ave.
Mailroom SGM 501, Office 826B
Los Angeles, CA 90089-1061
Mobile, preferred: (617) 548-2893
Office: x0-0850 or (213) 740-0850
Fax: (213) 746-9082
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