[R] how to fit Cox model with time dependent covariates?

[David Winsemius]

On Oct 16, 2012, at 10:24 AM, gallon li wrote:

> I wonder if there is a simple way of doing this?
>
> My data is very simple, a right censored outcome (T,delta) and the
> predictor is simply Z*t, i.e., the cox model is like
>
> h(t)=h0(t)exp(beta*Z*t)

That looks more like an accelerated time model than a Cox model. Is  
this homework for a course? Why is the form of the model specified if  
you haven't done any investigation?

-- 

David Winsemius, MD
Alameda, CA, USA