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| 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 * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/