topic How to control the significance level for the final set of variables in PROC LOGISTIC in Statistical Procedures https://communities.sas.com/t5/Statistical-Procedures/How-to-control-the-significance-level-for-the-final-set-of/m-p/51974#M2339 <HTML><HEAD></HEAD><BODY><P>It is SLSTAY/SLENTRY.<img id="smileyhappy" class="emoticon emoticon-smileyhappy" src="https://communities.sas.com/i/smilies/16x16_smiley-happy.png" alt="Smiley Happy" title="Smiley Happy" /></P></BODY></HTML> Mon, 22 Aug 2011 14:53:16 GMT Ruth 2011-08-22T14:53:16Z How to control the significance level for the final set of variables in PROC LOGISTIC https://communities.sas.com/t5/Statistical-Procedures/How-to-control-the-significance-level-for-the-final-set-of/m-p/51972#M2337 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I used PROC LOGISTIC to run a model using backward variable selection method. For this method, the final set of variables that were kept in the model have p-values &gt;0.05 for the Type3 analysis. This is not good if I want to keep only those variables with p-value&lt;=0.05. Can I ask how I can control the significance level for the final variables in PROC LOGISTIC? </P><P></P><P>THANKS. </P></BODY></HTML> Mon, 22 Aug 2011 09:09:28 GMT https://communities.sas.com/t5/Statistical-Procedures/How-to-control-the-significance-level-for-the-final-set-of/m-p/51972#M2337 Ruth 2011-08-22T09:09:28Z How to control the significance level for the final set of variables in PROC LOGISTIC https://communities.sas.com/t5/Statistical-Procedures/How-to-control-the-significance-level-for-the-final-set-of/m-p/51973#M2338 <HTML><HEAD></HEAD><BODY><P>Will setting the alpha= option do what you want?&nbsp; see, e.g.: <A href="http://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_logistic_sect004.htm">http://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_logistic_sect004.htm</A></P></BODY></HTML> Mon, 22 Aug 2011 14:04:49 GMT https://communities.sas.com/t5/Statistical-Procedures/How-to-control-the-significance-level-for-the-final-set-of/m-p/51973#M2338 art297 2011-08-22T14:04:49Z How to control the significance level for the final set of variables in PROC LOGISTIC https://communities.sas.com/t5/Statistical-Procedures/How-to-control-the-significance-level-for-the-final-set-of/m-p/51974#M2339 <HTML><HEAD></HEAD><BODY><P>It is SLSTAY/SLENTRY.<img id="smileyhappy" class="emoticon emoticon-smileyhappy" src="https://communities.sas.com/i/smilies/16x16_smiley-happy.png" alt="Smiley Happy" title="Smiley Happy" /></P></BODY></HTML> Mon, 22 Aug 2011 14:53:16 GMT https://communities.sas.com/t5/Statistical-Procedures/How-to-control-the-significance-level-for-the-final-set-of/m-p/51974#M2339 Ruth 2011-08-22T14:53:16Z How to control the significance level for the final set of variables in PROC LOGISTIC https://communities.sas.com/t5/Statistical-Procedures/How-to-control-the-significance-level-for-the-final-set-of/m-p/51975#M2340 <HTML><HEAD></HEAD><BODY><P>If you have interactions in the model, the default is to maintain a heirarchical model.&nbsp; That is, if A*B is in the model, then A and B are required to be in the model.&nbsp; In such a case, A or B may not meet the significance level requirements.&nbsp; You can turn off model hierarchy with the HIER= option in the MODEL statement.</P></BODY></HTML> Wed, 24 Aug 2011 21:16:59 GMT https://communities.sas.com/t5/Statistical-Procedures/How-to-control-the-significance-level-for-the-final-set-of/m-p/51975#M2340 StatDave 2011-08-24T21:16:59Z