[R] compare c-index of two logistic models using rcorrp.senc() of the Hmisc library

Dear R-help, Would it be appropriate to do the following to calculate a p-value for the difference between c-ind of x1 and c-inx of x2 using the output from rcorrp.senc() r-rcorrp.senc(x1,x1,y) pValue-1-pnorm((r[11]-r[12])/(r[2]/r[5])*1.96) Osman O. Al-Radi, MD, MSc, FRCSC Chief Resident,

Re: [R] compare c-index of two logistic models using rcorrp.senc() of the Hmisc library

Osman Al-Radi wrote: Dear R-help, Would it be appropriate to do the following to calculate a p-value for the difference between c-ind of x1 and c-inx of x2 using the output from rcorrp.senc() r-rcorrp.senc(x1,x1,y) pValue-1-pnorm((r[11]-r[12])/(r[2]/r[5])*1.96) Osman O.