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    <title>topic adding interaction terms to surveylogistic in Statistical Procedures</title>
    <link>https://communities.sas.com/t5/Statistical-Procedures/adding-interaction-terms-to-surveylogistic/m-p/252543#M13324</link>
    <description>&lt;P&gt;Hi, I have the following code for a logistic regression:&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;proc surveylogistic data =&amp;nbsp;mydata;&lt;BR /&gt;strata STRATUM ; cluster SECU ; weight LBWGTR08 ;&lt;BR /&gt;class Female (ref="1") Ethnicity (ref="1") married08 (ref="1") SRHealthCat08 (ref = "1") &amp;nbsp;/param=ref ;&lt;BR /&gt;model SocPartAttendEventsDichot08 (Event = '1') = Age08 female ethnicity married08 SRHealthCat08&amp;nbsp;PopPct65up &amp;nbsp;/ expb clodds ;&lt;/P&gt;&lt;P&gt;run ;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I want to add interaction terms and tried adding female*married08 like this:&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;proc surveylogistic data =&amp;nbsp;mydata;&lt;BR /&gt;strata STRATUM ; cluster SECU ; weight LBWGTR08 ;&lt;BR /&gt;class Female (ref="1") Ethnicity (ref="1") married08 (ref="1") SRHealthCat08 (ref = "1") &amp;nbsp;/param=ref ;&lt;BR /&gt;model SocPartAttendEventsDichot08 (Event = '1') = Age08 female ethnicity married08 SRHealthCat08&amp;nbsp;PopPct65up &lt;U&gt;female*married08&lt;/U&gt; / expb clodds ;&lt;/P&gt;&lt;P&gt;run ;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;But in the results, there was no odds ratio estimates for female*married08 - but this variable was included in other tables in the output. I'm not sure why there is no odds ratio - any help would be appreciated!&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I'm using SAS Enterprise guide 6.1&lt;/P&gt;</description>
    <pubDate>Thu, 25 Feb 2016 21:27:16 GMT</pubDate>
    <dc:creator>Cdot</dc:creator>
    <dc:date>2016-02-25T21:27:16Z</dc:date>
    <item>
      <title>adding interaction terms to surveylogistic</title>
      <link>https://communities.sas.com/t5/Statistical-Procedures/adding-interaction-terms-to-surveylogistic/m-p/252543#M13324</link>
      <description>&lt;P&gt;Hi, I have the following code for a logistic regression:&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;proc surveylogistic data =&amp;nbsp;mydata;&lt;BR /&gt;strata STRATUM ; cluster SECU ; weight LBWGTR08 ;&lt;BR /&gt;class Female (ref="1") Ethnicity (ref="1") married08 (ref="1") SRHealthCat08 (ref = "1") &amp;nbsp;/param=ref ;&lt;BR /&gt;model SocPartAttendEventsDichot08 (Event = '1') = Age08 female ethnicity married08 SRHealthCat08&amp;nbsp;PopPct65up &amp;nbsp;/ expb clodds ;&lt;/P&gt;&lt;P&gt;run ;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I want to add interaction terms and tried adding female*married08 like this:&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;proc surveylogistic data =&amp;nbsp;mydata;&lt;BR /&gt;strata STRATUM ; cluster SECU ; weight LBWGTR08 ;&lt;BR /&gt;class Female (ref="1") Ethnicity (ref="1") married08 (ref="1") SRHealthCat08 (ref = "1") &amp;nbsp;/param=ref ;&lt;BR /&gt;model SocPartAttendEventsDichot08 (Event = '1') = Age08 female ethnicity married08 SRHealthCat08&amp;nbsp;PopPct65up &lt;U&gt;female*married08&lt;/U&gt; / expb clodds ;&lt;/P&gt;&lt;P&gt;run ;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;But in the results, there was no odds ratio estimates for female*married08 - but this variable was included in other tables in the output. I'm not sure why there is no odds ratio - any help would be appreciated!&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I'm using SAS Enterprise guide 6.1&lt;/P&gt;</description>
      <pubDate>Thu, 25 Feb 2016 21:27:16 GMT</pubDate>
      <guid>https://communities.sas.com/t5/Statistical-Procedures/adding-interaction-terms-to-surveylogistic/m-p/252543#M13324</guid>
      <dc:creator>Cdot</dc:creator>
      <dc:date>2016-02-25T21:27:16Z</dc:date>
    </item>
    <item>
      <title>Re: adding interaction terms to surveylogistic</title>
      <link>https://communities.sas.com/t5/Statistical-Procedures/adding-interaction-terms-to-surveylogistic/m-p/339717#M17891</link>
      <description>&lt;P&gt;I'm also having the same issue. Any comments will be appreciated.&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Thu, 09 Mar 2017 17:38:39 GMT</pubDate>
      <guid>https://communities.sas.com/t5/Statistical-Procedures/adding-interaction-terms-to-surveylogistic/m-p/339717#M17891</guid>
      <dc:creator>SSach</dc:creator>
      <dc:date>2017-03-09T17:38:39Z</dc:date>
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