https://communities.sas.com/t5/Statistical-Procedures/Somers-D/m-p/5139#M20137 This question is about SAS/STAT and I think this forum might be the best fit for my question. <BR /> <BR /> In categorical data analysis, SAS generates Somers' D to test the association strength between categorical variables. <BR /> <BR /> In SAS, both Proc Freq and Proc Logistic generate Somers' D. My question is what is the difference between the Somers' D from Proc Freq and Proc Logistic? <BR /> <BR /> Most of time, Somers' D from Proc Logistic (when only one factor is applied) is quite closed to the Somers' D from Proc Freq. However, they could also be quite different. Could someone tell me what make values from both Procedures so different?<BR /> <BR /> Thanks in advance.<BR /> <BR /> Ben Sun, 21 Oct 2007 16:45:35 GMT deleted_user 2007-10-21T16:45:35Z https://communities.sas.com/t5/Statistical-Procedures/Somers-D/m-p/5139#M20137 This question is about SAS/STAT and I think this forum might be the best fit for my question. <BR /> <BR /> In categorical data analysis, SAS generates Somers' D to test the association strength between categorical variables. <BR /> <BR /> In SAS, both Proc Freq and Proc Logistic generate Somers' D. My question is what is the difference between the Somers' D from Proc Freq and Proc Logistic? <BR /> <BR /> Most of time, Somers' D from Proc Logistic (when only one factor is applied) is quite closed to the Somers' D from Proc Freq. However, they could also be quite different. Could someone tell me what make values from both Procedures so different?<BR /> <BR /> Thanks in advance.<BR /> <BR /> Ben Sun, 21 Oct 2007 16:45:35 GMT https://communities.sas.com/t5/Statistical-Procedures/Somers-D/m-p/5139#M20137 deleted_user 2007-10-21T16:45:35Z https://communities.sas.com/t5/Statistical-Procedures/Somers-D/m-p/5140#M20138 The method of calculation may differ quite markedly for each procedure to allow for the functionality provided by the analysis.<BR /> <BR /> The calculation method for each procedure is explored in great detail, and will make profound sense to someone who understands statistical techniques and the limitations of particular interpretive methods.<BR /> <BR /> If you don't have SAS/Help installed, look up the product documentation on the SAS website, navigate through the product <SAS> and look at the background material supplied for the appropriate procedure.<BR /> <BR /> Kind regards<BR /> <BR /> David</SAS> Mon, 29 Oct 2007 01:35:32 GMT https://communities.sas.com/t5/Statistical-Procedures/Somers-D/m-p/5140#M20138 deleted_user 2007-10-29T01:35:32Z