Calculating Concordance (C-index) for cox models
I'm trying to calculate concordance index in JMP 10 of a cox model. I found this paper for SAS: http://support.sas.com/resources/papers/proceedings09/236-2009.pdf but am not quite understanding what it is that it's doing. Any help is appreciated. proc sql; create table allset as select idn_j, y_j, x_j, idn as idn_i, surv as y_i, combdays as x_i from evtset, obs where idn_j<>idn; quit; d...
