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st: RE: Survival analysis - individual survival functions
From
"Seed, Paul" <paul.seed@kcl.ac.uk>
To
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject
st: RE: Survival analysis - individual survival functions
Date
Thu, 16 Dec 2010 20:31:43 +0000
Thanks Steve.
I had been hoping to avoid doing all the algebra (or at
least get some pre-calculated values to check my algebra
against).
It6 seems I'm out of luck.
Date: Wed, 15 Dec 2010 20:09:30 -0500
From: Steven Samuels <sjsamuels@gmail.com>
Subject: Re: st: Survival analysis - individual survival functions
Paul,
-predict- gives values at the observations after every regression
command. To get it for arbitrary values of the inputs, you have to do
it yourself. S(t| t_0) = S(t)/S(t_0), and the formulas for S(.) are
on page 358 of the Stata Manual (V 11). You can get the linear
predictor for any values of the X's with -margins- or -adjust-
( Stata<11). Add the appropriate auxiliary parameters (returned
results e(theta), e(aux_p), e(gamma), e(sigma), e(kappa)); your t and
t_0; then plug everything into the formulas.
Steve
Steven J. Samuels
sjsamuels@gmail.com
18 Cantine's Island
Saugerties NY 12477
USA
Voice: 845-246-0774
Fax: 206-202-4783
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