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derekg
Obsidian | Level 7

I see that you can use the CONCORDANCE option with PROC PHREG to compute Harrell's Concordance Statistic, but I can't seem to figure out a way to have 95% confidence limits included in the output. Would I have to use CONCORDANCE=HARRELL(SE), and then calculate the 95% CI as Estimate +/- 1.96*(Standard Error) ?

1 REPLY 1
StatDave
SAS Super FREQ
Yes. Since the delta method is used to obtain the standard error, it is assumed that the statistic is asymptotically normal.

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