Mark,
You can rely on the aweight (it is equivalent to pweight) for the point
estimation (loneway) but not for standard errors of the estimate. In the
case of standard errors, different sample designs give very different
results.
The following might help you:
http://www.stata.com/support/faqs/stat/survey.html
http://www.stata.com/support/faqs/stat/supweight.html
Computing interclass correlations and large ANOVAs
Author: John R. Gleason, Syracuse University
findit iclassr
rafa
----- Original Message -----
From: "Mark A. Veazie" <[email protected]>
To: <[email protected]>
Sent: Friday, February 27, 2004 3:32 PM
Subject: st: intraclass corr w pweight
> I can't figure out how to obtain an intraclass correlation coefficient to
> quantify "household clustering" of dichotomous variables in a stratified
> cluster survey. It was a household interview survey where all adults in
each
> household were interviewed, and where households (PSUs) were
systematically
> selected PPS from within 10 strata were included. We need to incorporate
> sample weights (that are multiplied by a post-stratification factor as
well).
> I'm only working with prevalence estimates, not multivariable analysis at
this
> point. How do we do it with STATA? Svy commands don't seem to help with
> intraclass correlation coefficients or comparable measures.
>
> I was going to neglect strata and use loneway to obtain point estimates of
the
> intraclass correlation coefficient and then bootstrap this command to
obtain
> confidence intervals (since our variables are mostly dichotomous and the
> literature suggests that the confidence intervals will not be reliable).
BUT
> loneway doesn't allow for pweights, only aweights.
>
> Any suggestions for how to make loneway work with pweights? For how to
obtain
> intraclass correlation coefficients with weighted survey data using
another
> command? For using another measure of household effect with another set
of
> commands?
>
> Thanks for your consideration, Mark
>
> --
> Mark A. Veazie, Dr.P.H., M.P.H.
> Epidemiologist
> Native American Cardiology Program
> Indian Health Service
> U.S. Department of Health and Human Services
> 1215 N. Beaver Street, Suite 201
> Flagstaff, Arizona 86001
> 928.214.3920
> Fax 928.214.3924
> email [email protected]
>
>
>
> *
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> * http://www.ats.ucla.edu/stat/stata/
>
*
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