Displaying 1 result from an estimated 1 matches for "egfr_base".
2011 Dec 26
2
Problem of COX model with time dependent covariate
Hi all,
I am trying to detect association between a covariate and a disease outcome using R. This covariate shows time-varying effect, I add a time-covariate interaction item to build Cox model as follows:
COX <- coxph(as.formula("Surv(TIME,outcome)~eGFR_BASE+eGFR_BASE:TIME"),ori.data);
coef exp(coef) e(coef) z p
eGFR_BASE 6.40 603.5133 0.3702 17.3 0
eGFR_BASE:TIME -3.41 0.0329 0.0772 -44.2 0
But the result seems very different from that got by...