topic Re: How to change the reference category in logistic regression analysis with Enterprise Guide? in SAS Enterprise Guide https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115811#M9807 <HTML><HEAD></HEAD><BODY><P>Thanks, I did not know how to do this either so useful to know for the future but in here I wanted to change independent variable as pointed out by Reeza.</P></BODY></HTML> Thu, 21 Feb 2013 07:55:55 GMT KekeK 2013-02-21T07:55:55Z How to change the reference category in logistic regression analysis with Enterprise Guide? https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115807#M9803 <HTML><HEAD></HEAD><BODY><P>When running logistic regression with Enterprise Guide 5.1, how can I change the reference category within a parameter against which odds ratio estimates are presented? E.g. in below I would like to see how smoking occasionally (1) or daily (2) increases the odds of the health outcome as compared to smoking never (0) instead of comparisons 0 vs 2 and 1 vs 2. Odds Ratio Estimates Effect Point Estimate 95% Wald Confidence Limits Smoking 0 vs 2 0.878 0.189 4.075 Smoking 1 vs 2 0.291 0.040 2.123 Thanks!</P></BODY></HTML> Wed, 20 Feb 2013 13:12:21 GMT https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115807#M9803 KekeK 2013-02-20T13:12:21Z Re: How to change the reference category in logistic regression analysis with Enterprise Guide? https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115808#M9804 <HTML><HEAD></HEAD><BODY><P>When building your model, save your code.&nbsp; In proc logistic, change (PARAM=EFFECT) to (PARAM=REF REF='0').&nbsp; Then re-run with this change.&nbsp; That should give you what you are looking for.</P><P></P><P>Steve Denham</P></BODY></HTML> Wed, 20 Feb 2013 15:51:31 GMT https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115808#M9804 SteveDenham 2013-02-20T15:51:31Z Re: How to change the reference category in logistic regression analysis with Enterprise Guide? https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115809#M9805 <HTML><HEAD></HEAD><BODY><P>You *might* be able to achieve it without hand-coding.&nbsp; If your "dependent" var has 3 levels, then you can select "Ordered" or "Unordered" from the Model Response page, and then select the "Reference level" value.&nbsp; I'm not sure if this gets you the content you're looking for, but maybe it will help.</P><P></P><P><IMG alt="logistic.png" class="jive-image-thumbnail jive-image" src="https://communities.sas.com/legacyfs/online/3112_logistic.png" width="450" /></P><P></P><P>Chris</P></BODY></HTML> Wed, 20 Feb 2013 16:04:10 GMT https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115809#M9805 ChrisHemedinger 2013-02-20T16:04:10Z Re: How to change the reference category in logistic regression analysis with Enterprise Guide? https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115810#M9806 <HTML><HEAD></HEAD><BODY><P>I think the OP is looking to change an independent variable not a dependent variable.</P><P>The model suggested would be a way of specifying a multinomial logistic regression instead of a logistic regression, from what I understand, though I'd have to check the code. </P></BODY></HTML> Wed, 20 Feb 2013 16:09:20 GMT https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115810#M9806 Reeza 2013-02-20T16:09:20Z Re: How to change the reference category in logistic regression analysis with Enterprise Guide? https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115811#M9807 <HTML><HEAD></HEAD><BODY><P>Thanks, I did not know how to do this either so useful to know for the future but in here I wanted to change independent variable as pointed out by Reeza.</P></BODY></HTML> Thu, 21 Feb 2013 07:55:55 GMT https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115811#M9807 KekeK 2013-02-21T07:55:55Z Re: How to change the reference category in logistic regression analysis with Enterprise Guide? https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115812#M9808 <HTML><HEAD></HEAD><BODY><P>Thank you! I was hoping this could be done without editing the codes, kind of odd that it cannot and hopefully something that will be fixed in future versions. A bit slower this way but otherwise works well. </P></BODY></HTML> Thu, 21 Feb 2013 08:01:30 GMT https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115812#M9808 KekeK 2013-02-21T08:01:30Z Re: How to change the reference category in logistic regression analysis with Enterprise Guide? https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115813#M9809 <HTML><HEAD></HEAD><BODY><P>In general, if you're doing logistic or survival analysis, I found you very quickly need to step out of the EG GUI.&nbsp; </P></BODY></HTML> Thu, 21 Feb 2013 19:11:15 GMT https://communities.sas.com/t5/SAS-Enterprise-Guide/How-to-change-the-reference-category-in-logistic-regression/m-p/115813#M9809 Reeza 2013-02-21T19:11:15Z