duration model with time-varying covariates, how do I
realize it by stcox?
For Example,
Id time-varying variable year failure duration
1 1.1 2000 0 1
1 1.35 2001 1 2 2
1.14 2000 0 1
2 1.39 2001 0 2
2 1.61 2002 0 3
2 1.89 2003 0 4
3 1.03 2000 0 1
3 1.30 2001 0 2
3 1.68 2002 1 3
I read the stata book and found that the
example for time-varying covariate model is different
from mine.
I tried two ways but both are wrong.
One way: stset duration, id(id) failure(some
variable)
Stcox
It seems that this way only used the
time-varying variable in the first year.
Another way, adopt the option ��tvc��, but
the following words confused me
If tvc(varlist) is used without texp(exp),
Stata understands
that you mean texp(_t), and thus multiplies
the time-varying
covariates by the analysis time.
Could you give me some advice on how to do
time-varying model in Stata?
Thanks a lot!
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