Thank you very much guys. Your comments were very
helpful.
Mohammed Faramawi
--- Svend Juul <[email protected]> wrote:
> Mohammed El Faramawi wrote:
>
> I am trying to calculate the incidence rate
> ratio(IRR)
> for a categorical variable ( Mortality) which has
> two categories only ( dead or alive) in a
> probability
> weighted sample. I am also trying to adjust for
> covariates. I know that poisson regression can be
> used
> to calculate (IRR) and adjust for covariates given
> that the outcome is a count for example the number
> of
> deaths, number stroke attacks, etc . My question is
> what regression should I use in such a situation
> i.e
> outcome which is not count.Can I still use poisson
> regression which I doubt it?? Thank you
>
>
---------------------------------------------------------------------
>
> You can use the -poisson- command with individual or
> aggregated data;
> the examples in the manual and the help file are
> with aggregated data,
> but the command works fine with individual data,
> coded 1 for dead and
> 0 for alive. To estimate the incidence rate ratio,
> each individual's
> time at risk should also be recorded, here as the
> variable -risktime-.
>
> Example:
>
> . poisson died x1 x2 x3, exposure(risktime) irr
>
> Hope this helps,
> 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, work: +45 8942 6090
> Phone, home: +45 8693 7796
> Fax: +45 8613 1580
> E-mail: [email protected]
>
_________________________________________________________
>
>
>
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