If you specify the BINWIDTH=0 and OUTROC= options in the MODEL statement of PROC LOGISTIC, the c statistic (area under the ROC curve) may incorrectly be reported as 0.5 and the "Percent Tied" may equal 100%.

To avoid this problem, specify the ROC statement (for example: roc; ), or specify a small, nonzero value in the BINWIDTH= option. However, very small values may require excessive amounts of memory. Values in the range of 10**-4 to 10**-6 should be sufficiently small (for example: binwidth=1e-4).

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