st: Re: Centering on age for -stcox-

["Martin Weiss" <martin.weiss1@gmx.de>]

-h egen, std()-

HTH
Martin 
_______________________
----- Original Message ----- 
From: "Michael McCulloch" <mm@pinest.org>
To: "Statalist" <statalist@hsphsun2.harvard.edu>
Sent: Friday, September 26, 2008 10:23 PM
Subject: st: Centering on age for -stcox-



> Hello,
> In studying the manual (v9, page 147) section on the Technical Note 
> for Example 7 of -stcox-, I read that specifying the baseline hazard 
> option requires all variables to make sense if they would be equal to 
> zero (which of course would not be the case with a variable such as 
> age). That makes sense to me.
>
> At the bottom of that page, I read that this can be resolved by 
> subtracting mean age from each subject's age. I wish to do this 
> within a short program. How would I write a command that subtracts 
> the mean from age for each observation?
>
>
>
> Michael
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