https://communities.sas.com/kntur85557/tracker penlight Tracker Tue, 10 Mar 2026 06:59:03 GMT 2026-03-10T06:59:03Z https://communities.sas.com/t5/Statistical-Procedures/PROC-LOGISTIC-ROC-statement-why-Wald-95-CI-with-Mann-Whitney/m-p/17726#M508 I am relatively new to working with ROC curves and associated AUC statistic, thus had a question regarding the output from PROC LOGISTIC when you use the ROC statement.<BR /> <BR /> I understand that the AUC is equivalent to the result obtained with Mann-Whitney test. <BR /> <BR /> However if Mann-Whitney is a nonparametric test, how can it be associated with a Wald 95% CI's? I thought that Wald assumed an approximate normal distribution? I suspect this is related to the central limit theorem, however the ROC results show that Mann-Whitney is the overall header for the AUC, the Wald SE, and the Wald 95% CI. Is it that the Mann-Whitney is used to calculate the AUC, however a normal distribution is assumed to calculate a Wald SE. <BR /> <BR /> How would this be reported in a journal paper? "AUC were calculated using Mann-Whitney statistic with associated Wald 95% confidence intervals."<BR /> <BR /> thank you for the advice and assistance,<BR /> - mike Fri, 15 Oct 2010 21:37:38 GMT https://communities.sas.com/t5/Statistical-Procedures/PROC-LOGISTIC-ROC-statement-why-Wald-95-CI-with-Mann-Whitney/m-p/17726#M508 penlight 2010-10-15T21:37:38Z