Re: [R] Plot of coxph tt effects

On Nov 1, 2013, at 11:16 AM, cesar garcia perez de leon wrote: > Dear all, > > We are conducting a study in with a set of covariates and a time to event > outcome. > Covariates b1 and b3 violate proportionality. Can you describe the basis for that statement? > We applied a coxph with a „tt‰

[R] Plot of coxph tt effects

Dear all, We are conducting a study in with a set of covariates and a time to event outcome. Covariates b1 and b3 violate proportionality. We applied a coxph with a “tt” term to evaluate the nature of time dependence. Call: coxph(formula = Surv(start - 1, stop, outcome) ~ tt(b1) + b5 +