I tested the difference in the area under ROC curves
for two different logistic models with the same sample
of patients. I did this using the logistic linear
predictors and the roccomp command, which uses the
algorithm suggested by DeLong et al. (1988) by
default.
A journal reviewer is questioning why I didn't use the
binormal method of Metz & Kronman (1980).
My reasoning is that I used a nonparametric ROC
analysis and didn't want to assume a bivariate normal
distribution. I suspect that both methods will yield
similar results but I would be interested in others'
viewpoints.
SR Millis
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