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| From | "JVerkuilen (Gmail)" <jvverkuilen@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Observations differ |
| Date | Sun, 23 Sep 2012 08:57:33 -0400 |
On Sun, Sep 23, 2012 at 8:02 AM, Shittu, Aminu <ameen_vet@yahoo.com> wrote: > Hi all > > I am trying to compare, using likelihood ratio test, between the full and reduced model in a random effect logistic regression; but the output is saying "observations differ: 3356 vs. 3583." How can I handle this problem, please.> Others have indicated how to do the LR test with listwise deletion, which involves dropping the cases for which one or more covariates are missing. However, you are losing quite a number of observations and it might be a good idea to look into using a modern missing data analysis method like multiple imputation, which Stata has built in. Probably easiest to see the dialog box as there are a lot of steps. -- JVVerkuilen, PhD jvverkuilen@gmail.com "Out beyond ideas of wrong-doing and right-doing there is a field. I'll meet you there. When the soul lies down in that grass the world is too full to talk about." ---Rumi * * 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/