Hi All,
I posted earlier about an inability to obtain predicted margins using
Stata 11.
Thank you for the advice about using the vce(unconditional) option.
This fails with the following error message:
. margins x, vce(unconditional)
unconditional standard errors derived assuming full estimation sample;
indepvars dropped observations from the estimation sample
As a reminder, I have a created a subpop of ~2500 observations (total
5000+) and would like to obtain the age- sex- race adjusted prevalence
of my dichotomous outcome by cystatin-c quartile. Data is svyset; svy
logistic model including age, sex and race and cystatin-c was run,
followed by the marginals command.
Thanks,
Sue
. svy, subpop(subpopnodm): logistic pad i.x age56 sex01 race2
(running logistic on estimation sample)
Survey: Logistic regression
Number of strata = 28 Number of obs =
5684
Number of PSUs = 57 Population size =
230532837
Subpop. no. of obs =
2472
Subpop. size =
90812359.8
Design df =
29
F( 6, 24) =
28.73
Prob > F =
0.0000
------------------------------------------------------------------------------
| Linearized
pad | Odds Ratio Std. Err. t P>|t| [95% Conf.
Interval]
-------------+----------------------------------------------------------------
x |
2 | 1.521746 .5364044 1.19 0.243 .7400256
3.12923
3 | 4.057542 2.135947 2.66 0.013 1.382564
11.90805
4 | 9.510348 3.931692 5.45 0.000 4.083106
22.15145
|
age56 | 4.655526 2.164545 3.31 0.003 1.798843
12.04881
sex01 | 1.14324 .236113 0.65 0.522 .749361
1.744149
race2 | 2.314983 .5035135 3.86 0.001 1.483732
3.611936
------------------------------------------------------------------------------
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
