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    <title>topic Estimate propensity score - random effect? in Statistical Procedures</title>
    <link>https://communities.sas.com/t5/Statistical-Procedures/Estimate-propensity-score-random-effect/m-p/239449#M12678</link>
    <description>&lt;P&gt;Hi,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;I am performing a PS-matched comparative effectiveness study of two drugs (A and B). I have data for 3 years and I want to estimate PS based on data for these years. PS are estimated based on covarites before initiating treatment A or B.&lt;/P&gt;
&lt;P&gt;During this period a subject initially treated with drug A may have switched to drug B during this time-period of three years. This subject may thefore exist in the data both treated with drug A and with drug B (but with different covarites before before initiation of A and B). They are probably not independed. &lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Have anyone experience of estimating propensity score (PS) where the same subject may occur two times?&lt;/P&gt;
&lt;P&gt;Is it possible? Mixed-effect logistic regression?&lt;/P&gt;
&lt;P&gt;(I am just curious about the estimation of PS, the estimated treatment effect I will handle at a later stage)&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Thanks in advance!&lt;/P&gt;
&lt;P&gt;Thomas&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
    <pubDate>Tue, 15 Dec 2015 22:53:00 GMT</pubDate>
    <dc:creator>bollibompa</dc:creator>
    <dc:date>2015-12-15T22:53:00Z</dc:date>
    <item>
      <title>Estimate propensity score - random effect?</title>
      <link>https://communities.sas.com/t5/Statistical-Procedures/Estimate-propensity-score-random-effect/m-p/239449#M12678</link>
      <description>&lt;P&gt;Hi,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;I am performing a PS-matched comparative effectiveness study of two drugs (A and B). I have data for 3 years and I want to estimate PS based on data for these years. PS are estimated based on covarites before initiating treatment A or B.&lt;/P&gt;
&lt;P&gt;During this period a subject initially treated with drug A may have switched to drug B during this time-period of three years. This subject may thefore exist in the data both treated with drug A and with drug B (but with different covarites before before initiation of A and B). They are probably not independed. &lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Have anyone experience of estimating propensity score (PS) where the same subject may occur two times?&lt;/P&gt;
&lt;P&gt;Is it possible? Mixed-effect logistic regression?&lt;/P&gt;
&lt;P&gt;(I am just curious about the estimation of PS, the estimated treatment effect I will handle at a later stage)&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Thanks in advance!&lt;/P&gt;
&lt;P&gt;Thomas&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Tue, 15 Dec 2015 22:53:00 GMT</pubDate>
      <guid>https://communities.sas.com/t5/Statistical-Procedures/Estimate-propensity-score-random-effect/m-p/239449#M12678</guid>
      <dc:creator>bollibompa</dc:creator>
      <dc:date>2015-12-15T22:53:00Z</dc:date>
    </item>
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