Message-ID: <3305B3D2-C910-4DC6-8B63-537F0B286C73@comcast.net>
Date: 2012-10-17T00:36:27Z
From: David Winsemius
Subject: how to fit Cox model with time dependent covariates?
In-Reply-To: <CAKO0DpiZcg=RN-y0GJMg4cwzCsawzoiyMOPcGnBqq9Qh-_gB5g@mail.gmail.com>
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