On Mon, 5 Feb 2007, John Sorkin wrote:
> When running a cox proportional hazards model ,there are two ways to
> deal with age,
> including age as a covariate, or to include age as part of the
> follow-up time, viz,
> I would appreciate any thoughts about the differences in the
> interpretation of
John Sorkin wrote:
> Peter,
> Many thanks for your prompt reply.
>
> I think you may have been too quick to dismiss model2; there is no need for
> time to be negative. The time parameter is Surv represents survival, i.e.
> follow-up time. We usually start the follow-up clock at the time a subject
Peter,
Many thanks for your prompt reply.
I think you may have been too quick to dismiss model2; there is no need for
time to be negative. The time parameter is Surv represents survival, i.e.
follow-up time. We usually start the follow-up clock at the time a subject is
enrolled into a study, bu
John Sorkin wrote:
> I hope one and all will allow a stats question:
>
> When running a cox proportional hazards model ,there are two ways to
> deal with age,
> including age as a covariate, or to include age as part of the
> follow-up time, viz,
>
> Age as a covariate:
>
> tetest1 <- list(time=
I hope one and all will allow a stats question:
When running a cox proportional hazards model ,there are two ways to
deal with age,
including age as a covariate, or to include age as part of the
follow-up time, viz,
Age as a covariate:
tetest1 <- list(time= c(4, 3,1,1,2,2,3),
