Displaying 2 results from an estimated 2 matches for "stratvar_".
2009 Jun 15
2
coxph and robust variance estimation
Hello,
I would like to compare two different models in the framework of Cox proportional hazards regression models.
On Rsitesearch and google I don't find a clear answer to my question.
My R-Code (R version 2.9.0)
coxph.fit0 <- coxph(y ~ z2_ + cluster(as.factor(keys))+ strata(stratvar_),
method="breslow" ,robust=T )
coxph.fit1 <- coxph(y ~ z_ + cluster(as.factor(keys))+ strata(stratvar_),
method="breslow" ,robust=T ) # marker and covariates
# Analysis of Devaince table
coxph.aov <- anova(coxph.fit0 , coxph.fit1, test="Chisq")
In...
2009 Jun 15
0
books on Time serie
...re two different models in the framework of Cox
> proportional hazards regression models.
>
> On Rsitesearch and google I don't find a clear answer to my question.
>
> My R-Code (R version 2.9.0)
>
> coxph.fit0 <- coxph(y ~ z2_ + cluster(as.factor(keys))+
> strata(stratvar_),
> method="breslow" ,robust=T )
>
> coxph.fit1 <- coxph(y ~ z_ + cluster(as.factor(keys))+
> strata(stratvar_),
> method="breslow" ,robust=T ) # marker and covariates
>
> # Analysis of Devaince table
> coxph.aov <- anova(coxph.fit0 , coxph...