Statalist The Stata Listserver


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: RE: r2 in -streg-/-stcox-


From   Nishant Dass <[email protected]>
To   [email protected]
Subject   Re: st: RE: r2 in -streg-/-stcox-
Date   Sat, 7 Oct 2006 02:05:38 -0700 (PDT)

Thank you very much for the clarification, Maarten.

Nishant 

--- Maarten buis <[email protected]> wrote:

> --- Nishant Dass <[email protected]> wrote:
> > why does the data of Hosmer and Lemeshow (that you use
> in your
> > note as well) mainly consist of categorical covariates
> and
> > not continuous variables?  Do continuous variables not
> lend
> > easily to survival analysis?  
> 
> Nishant:
> There is no problem with using continuous variables in
> survival
> analysis other than the assumption that the effect on log
> hazard or log
> time (depending on your model) is linear. This is of
> course no
> different from any other model that allows continuous
> variables. 
> 
> The only exception is if you want to compare the Kaplan
> Meier survival
> curves of different groups. In that case you will have to
> use a
> categorical variable. This is why in my example on Kaplan
> Meier
> estimates I use the distinction between poor and rich
> countries, and
> GDP per capita (a continuous variable) for -streg- and
> -stcox- models.
> HTH,
> Maarten
> 
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
> 
> visiting adress:
> Buitenveldertselaan 3 (Metropolitan), room Z434
> 
> +31 20 5986715
> 
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
> 
> 
> 		
>
___________________________________________________________
> 
> Try the all-new Yahoo! Mail. "The New Version is
> radically easier to use" � The Wall Street Journal 
> http://uk.docs.yahoo.com/nowyoucan.html
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index