R help - Jun 2008 - I wonder if cch function in Survival package can calculate time dependent covariate

Hi

In case cohort study, we can fit proportional hazard regression model to
case-cohort data. In R, the function is cch() in Survival package
Now I am working on case cohort analysis with time dependent covariates
using cch() of "Survival" R package. I wonder if cch() provide this
utility
or not?
The cch() manual does not say if time dependent covariate is allowed
I know coxph() in Survival package can estimate time dependent covariates.

Thanks

Jin Wang

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