search for: vasan

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2012 Jan 17
2
net classification improvement?
...ooking in to the "net reclassification improvement" (see below for reference) but thus far I can only find a version in Hmisc package which requires survival data. Any idea what the best approach is for cross-sectional data? Thanks Pencina MJ, D'Agostino RB Sr, D'Agostino RB Jr, Vasan RS. Evaluating the added predictive ability of a new marker: from area under the ROC curve to reclassification and beyond. Stat Med 2008;27:157-172
2008 Jun 12
1
About Mcneil Hanley test for a portion of AUC!
Dear all I am trying to compare the performances of several methods using the AUC0.1 and not the whole AUC. (meaning I wanted to compare to AUC's whose x axis only goes to 0.1 not 1) I came to know about the Mcneil Hanley test from Bernardo Rangel Tura and I referred to the original paper for the calculation of "r" which is an argument of the function cROC. I can only find the
2008 Jul 17
1
Comparing differences in AUC from 2 different models
Hi, I would like to compare differences in AUC from 2 different models, glm and gam for predicting presence / absence. I know that in theory the model with a higher AUC is better, but what I am interested in is if statistically the increase in AUC from the glm model to the gam model is significant. I also read quite extensive discussions on the list about ROC and AUC but I still didn't find