Re: st: calculating SMRs, examples?

["Raoul Reulen" <raoulreulen@hotmail.com>]

Yes, very helpful, thanks. I am still struggling with getting the external 
data right. After I've used stset and stsplit I need to calculated the 
expected number of deaths in each strata. I find it difficult to do that.

Raoul



> From: "Svend Juul" <SJ@SOCI.AU.DK>
> Reply-To: statalist@hsphsun2.harvard.edu
> To: <statalist@hsphsun2.harvard.edu>
> Subject: Re: st: calculating SMRs, examples?
> Date: Wed, 14 Sep 2005 14:27:39 +0200
>
> Raoul asked:
> Are there any good websites or books out there that explain in detail
> how to calculate a standardized mortality ratio (SMR) with poisson
> regression using external rates? I find that the STATA manuals do not
> contain a lot of information regarding this topic, any suggestions?
> ----
>
> I wrote, among other things:
>
> You may proceed from here to -poisson-; it requires the expected number
> of deaths:
>     . gen edeaths = pyrs*mrate
>     . poisson _d exposure(edeaths) , irr
> ----
>
> - and that was wrong. The -poisson- command should be:
>     . poisson _d , exposure(edeaths)
>
> To obtain the SMR, use -lincom- after -poisson-:
>     . lincom _cons , irr
>
> I hope this was not too confusing.
>
> Svend
>
> __________________________________________
>
> Svend Juul
> Institut for Folkesundhed, Afdeling for Epidemiologi
> (Institute of Public Health, Department of Epidemiology)
> Vennelyst Boulevard 6
> DK-8000  Aarhus C, Denmark
> Phone: +45 8942 6090
> Home:  +45 8693 7796
> Email: sj@soci.au.dk
> __________________________________________
>
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