Hi steven,
It seems that I am missing something. Why do you
recommend using svy:regress with a categorical
variable?? why not svy:logit from the beginning?
thank oyu
--- Steven Samuels <[email protected]> wrote:
> -svyset- your data. Then try -svy reg- for your 0-1
> outcome on the
> time dimension variable. If the prevalences are
> close to zero or
> one, you could consider -svy logit -. From your
> question, I take it
> that the surveys are independent, but taken over the
> time dimension
> and that the target populations were identical,
> except for time
> period. You will need to define new strata, which
> are combinations
> of survey and the original strata.
>
> This assumes that primary sampling units were newly
> sampled for each
> survey. If not, you cannot treat the surveys as
> independent and
> should come back here for help.
>
> -Steven
> On Mar 10, 2008, at 4:28 AM, [email protected]
> wrote:
>
> > hi,
> > I have data on three/four independent
> cross-sectional surveys (not
> > panels). I need to test for a trend in the
> prevalence of a health
> > condition. How can I do a trend analysis in Stata
> that will take
> > into account sampling weights and stratification?
> > thank you.
> >
> > Audrey P.
> >
> > *
> > * For searches and help try:
> > *
> http://www.stata.com/support/faqs/res/findit.html
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
>
> Steven Samuels
> 845-246-0774
> 18 Cantine's Island
> Saugerties, NY 12477
> EFax: 208-498-7441
>
>
>
>
>
> *
> * For searches and help try:
> *
> http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
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*
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