On Nov 27, 2012, at 6:22 PM, array chip wrote:
Hi, I am trying to calculate net reclassification improvement (NRI)
and Inegrated Discrimination Improvement (IDI) for a survival
dataset to compare 2 risk models. It seems that the improveProb() in
Hmisc package does this only for binary outcome, while rcorrp.cens()
does take survival object, but doesn't output NRI or IDI. Can anyone
suggest any other packages that can calculate NRI and IDI for
survival data?
The reference for NRI extending to survival data is:
Pencina MJ, D'Agostino RB, Steyerberg EW (2011): Extensions of net
reclassification improvement calculations to measure usefulness of new
biomarkers. Stat in Med 30:11-21
I think that question has been answered before. Did you search the
Archives?
--
David Winsemius, MD
Alameda, CA, USA
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