Why don't you suggest a text or an article I could read? Your comment
was not helpful.
On 10/29/05, BXC (Bendix Carstensen) <[log in to unmask]> wrote:
> This standard stuff in any course in linar models.
> Attend one.
>
> Bendix Carstensen
>
> > -----Original Message-----
> > From: A UK-based worldwide e-mail broadcast system mailing
> > list [mailto:[log in to unmask]] On Behalf Of Raphael Fraser
> > Sent: Friday, October 28, 2005 10:44 PM
> > To: [log in to unmask]
> > Subject: QUERY: Standard Error for Hazard Ratio in Survival Analysis
> >
> >
> > Dear All,
> >
> > I would like to calculate the standard error (s.e.) for the
> > Hazard Ratios (HR) involving an interaction term. I have the
> > following model: HR =exp(b1x+b2y+b3z+b4x*y). All variables
> > being continuous. I would like to fix x at 1 (i.e. x=1) while
> > holding all other variables constant. That is,
> > HR=exp(b1+b4y). Then calculate HRs at specific values of y.
> > My problem is calculating the Standard Error for these hazard
> > ratios so I can calculate the confidence intervals. I know
> > how to calculate the variance-covariance matrix for the model
> > but I am not quiet sure how to cal s.e. for the above HRs.
> > Can anyone help? References to journal article would also be helpful.
> >
> > Raphael
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