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st: Re: intraclass corr w pweight

From   "R.E. De Hoyos" <>
To   <>
Subject   st: Re: intraclass corr w pweight
Date   Fri, 27 Feb 2004 22:03:10 -0000


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

The following might help you:

 Computing interclass correlations and large ANOVAs
Author: John R. Gleason, Syracuse University

findit iclassr


----- Original Message -----
From: "Mark A. Veazie" <>
To: <>
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
> household were interviewed, and where households (PSUs) were
> selected PPS from within 10 strata were included.  We need to incorporate
> sample weights (that are multiplied by a post-stratification factor as
> I'm only working with prevalence estimates, not multivariable analysis at
> 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
> intraclass correlation coefficient and then bootstrap this command to
> confidence intervals (since our variables are mostly dichotomous and the
> literature suggests that the confidence intervals will not be reliable).
> loneway doesn't allow for pweights, only aweights.
> Any suggestions for how to make loneway work with pweights?  For how to
> intraclass correlation coefficients with weighted survey data using
> command?  For using another measure of household effect with another set
> 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
> *
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