topic I am trying to calculate sensitivity, specificity and PPV. in SAS Programming https://communities.sas.com/t5/SAS-Programming/I-am-trying-to-calculate-sensitivity-specificity-and-PPV/m-p/145483#M297240 <HTML><HEAD></HEAD><BODY><P>I have several values categorized into tertiles and I am trying to perform sensitivity analysis on different groups.&nbsp; Each tertile is not always present (aka the number of levels differs). For example, sometimes the highest exposure in the group is level 2 and sometimes the highest exposure is level 3. How can I write code to get the sensitivity, specificity and PPV when the levels present in the table are different each time I run the test on a different group? </P></BODY></HTML> Fri, 15 Nov 2013 17:45:05 GMT KJC 2013-11-15T17:45:05Z I am trying to calculate sensitivity, specificity and PPV. https://communities.sas.com/t5/SAS-Programming/I-am-trying-to-calculate-sensitivity-specificity-and-PPV/m-p/145483#M297240 <HTML><HEAD></HEAD><BODY><P>I have several values categorized into tertiles and I am trying to perform sensitivity analysis on different groups.&nbsp; Each tertile is not always present (aka the number of levels differs). For example, sometimes the highest exposure in the group is level 2 and sometimes the highest exposure is level 3. How can I write code to get the sensitivity, specificity and PPV when the levels present in the table are different each time I run the test on a different group? </P></BODY></HTML> Fri, 15 Nov 2013 17:45:05 GMT https://communities.sas.com/t5/SAS-Programming/I-am-trying-to-calculate-sensitivity-specificity-and-PPV/m-p/145483#M297240 KJC 2013-11-15T17:45:05Z Re: I am trying to calculate sensitivity, specificity and PPV. https://communities.sas.com/t5/SAS-Programming/I-am-trying-to-calculate-sensitivity-specificity-and-PPV/m-p/145484#M297241 <HTML><HEAD></HEAD><BODY><P>Hi, </P><P>Check this official SAS example <A href="http://support.sas.com/kb/24/170.html">here</A>.</P><P><A href="http://support.sas.com/kb/24/170.html" title="http://support.sas.com/kb/24/170.html">24170 - Estimating sensitivity, specificity, positive and negative predictive values, and other statistics</A></P></BODY></HTML> Sun, 17 Nov 2013 19:05:20 GMT https://communities.sas.com/t5/SAS-Programming/I-am-trying-to-calculate-sensitivity-specificity-and-PPV/m-p/145484#M297241 MohammadFayaz 2013-11-17T19:05:20Z