Re: st: repeat: predict after -streg-

[Steven Samuels <ssamuels@albany.edu>]

One more thought: Some hospitals may have enough readmissions to  
reliably estimate a fixed-effect hospital intercept. Do so for these  
hospitals and confine the random-effects model to the others.

-Steve
On Jul 13, 2007, at 12:20 PM, Steven Samuels wrote:



> Jeph,
>
> You don't need medians at all, just estimated 30 day readmission  
> rates.  I'm not up on this literature, but you might try the  
> following:
>
> 1. Fit a survival model with hospital random effects, using - 
> streg-, -stcox-, or -gllamm- with the -frailty- options to define  
> the distributions of the random effects.  You can probably improve  
> your predictive model if you add hospital factors as predictors.
>
> 2. Rank on the estimated hospital effects. (If you have hospital  
> level factors in your model, add their contribution  to the random  
> effect).  You can convert the model parameters to estimates of the  
> probabilities of 30 day readmission.
Steven JH Samuels
18 Cantine's Island
Saugerties, NY 12477

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