Hi Marisa,
An explanation of this problem is on the Stata Web site:
http://www.stata.com/support/faqs/stat/stratum.html
You might try collapsing PSUs and strata so every stratum has at least two
PSUs, i.e., use -svydes- to identify the problematic PSUs/strata, then
manually create new PSU/strata variables.
Alternatively, you might try -idonepsu-. (To find it in net-aware Stata,
type -webseek idonepsu-.)
Regards,
Alex
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Marisa Wilson
Sent: Monday, August 23, 2004 3:34 PM
To: [email protected]
Subject: st: STATA and NHIS data - Elementary Question
I am relatively new STATA user so forgive the naivete of my question to the
August users group.
I using the 2002 NHIS data and STATA 7 to do logistic regression modeling
for my dissertation analysis. I need to use svylogit and svyset for the
weight, strata and psu variables. However, I get a
r(460) error due to stratum with only one PSU encountered. In svydes, I do
have several psus with entires of 1.
Is there any way around this?
Marisa L. Wilson DNSc(c), MHSc, RN
Clinical Systems Project Leader
JHMCIS
office 410-614-1151
pager 410-283-2605
cell 443-540-6947
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
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*
* 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/
