Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: DHS survey data and Logistic regression


From   "Emma Slaymaker" <Emma.Slaymaker@lshtm.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: DHS survey data and Logistic regression
Date   Tue, 31 Jul 2007 11:11:22 +0100

Dear Olalekan,

You asked about accounting for the survey design when analysing DHS
data. You should account for the stratification and the clustering
whenever you calculate standard errors- if you do not, the standard
errors will not be correct.  I always include the weighting information
since I usually want to know if associations are likely to be true of
the population the survey is designed to represent (with weights) and
not just the survey sample (without weights).  Once you have accounted
for the stratification and clustering you don't really lose anything by
also accounting for the weights since you are already working with
robust standard errors.
I don't know of a reason why it would be inappropriate to use sample
weights in a regression analysis- but that may well be ignorance on my
part.
Hope this helps,
Emma

>>> Olalekan Uthman <uthlekan@yahoo.com> 30/07/07 15:49 >>>
Dear Stata users,

I am trying to run a logistic regression using Measure
DHS survey data. Quoting from DHS statistics guide:
"Use of sample weights is inappropriate for estimating
relationships, such as regression and correlation
coefficients.

I am not sure whether to ignore the psu and strata
also when running the logistic regression.


Can I just use

xi: logistic bmi i.edu

instead of:

svyset psu [pw=weight], strata(strata)

xi: svy: logistic bmi i.edu



____________________________________________________________________________________
Looking for a deal? Find great prices on flights and hotels with Yahoo!
FareChase.
http://farechase.yahoo.com/ 
*
*   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/
*
*   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/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index