https://communities.sas.com/t5/Statistical-Procedures/Comparing-the-difference-in-means-of-two-subgroups-for-a-binary/m-p/450359#M23551 <P>With a logistic model, the difference of LS-means as provided by the LSMEANS / DIFF statement is a difference in log odds, or log odds ratio. If you particularly need the difference in means, then that is a nonlinear combination of model parameters which can only be done using the <A href="http://support.sas.com/kb/58775" target="_self">NLEstimate macro</A>. You will have to determine the proper function to estimate based on your model. See <A href="http://support.sas.com/kb/37228.html" target="_self">this example</A> which shows estimating a difference in probabilities from a logistic model. It uses a model in PROC LOGISTIC, but the same should still apply to a model from SURVEYLOGISTIC.</P> Mon, 02 Apr 2018 14:19:12 GMT StatDave 2018-04-02T14:19:12Z https://communities.sas.com/t5/Statistical-Procedures/Comparing-the-difference-in-means-of-two-subgroups-for-a-binary/m-p/450109#M23533 <P>Does anyone know how I can compare the difference in means for a binary variable for two subgroups using one of the proc survey procedures? I have to use the proc survey procedures because my data has weights. I know I am supposed to use the LS means option, but I don't really see how a regression would make sense with my dependent variable and my subgroups as my independent. I did try doing it regardless in procsurveyreg, but I get non-est for some of my parameter estimates. Please help!</P> Sat, 31 Mar 2018 05:24:46 GMT https://communities.sas.com/t5/Statistical-Procedures/Comparing-the-difference-in-means-of-two-subgroups-for-a-binary/m-p/450109#M23533 knicks1189 2018-03-31T05:24:46Z https://communities.sas.com/t5/Statistical-Procedures/Comparing-the-difference-in-means-of-two-subgroups-for-a-binary/m-p/450359#M23551 <P>With a logistic model, the difference of LS-means as provided by the LSMEANS / DIFF statement is a difference in log odds, or log odds ratio. If you particularly need the difference in means, then that is a nonlinear combination of model parameters which can only be done using the <A href="http://support.sas.com/kb/58775" target="_self">NLEstimate macro</A>. You will have to determine the proper function to estimate based on your model. See <A href="http://support.sas.com/kb/37228.html" target="_self">this example</A> which shows estimating a difference in probabilities from a logistic model. It uses a model in PROC LOGISTIC, but the same should still apply to a model from SURVEYLOGISTIC.</P> Mon, 02 Apr 2018 14:19:12 GMT https://communities.sas.com/t5/Statistical-Procedures/Comparing-the-difference-in-means-of-two-subgroups-for-a-binary/m-p/450359#M23551 StatDave 2018-04-02T14:19:12Z