search for: pwpfit

Displaying 1 result from an estimated 1 matches for "pwpfit".

2012 May 30
0
anova.coxph for multiple events model
Hi, I'm trying to do a multiple events model using coxph. I need to choose which covariates stay in the final model and i'm using anova but it seems that it doesn't work with robust variances as a error message appears when I try to do it: /PWPfit<-coxph(Surv(ini,fim,status)~Sexo+Transmissao+Regime+HAART+Drogas+Psi+ + CD4+CV+Neo+IO+cluster(idPARTICIPANTE)+strata(Estrato),data=PWP) > anova(PWPfit) Error in anova.coxph(PWPfit) : Can't do anova tables with robust variances / However when I fit two different nested models the func...