# Re: st: Re: comparing OR (coefficients) across equations

 From Ricardo Ovaldia <[email protected]> To [email protected] Subject Re: st: Re: comparing OR (coefficients) across equations Date Tue, 2 Nov 2004 05:51:42 -0800 (PST)

Great. Thank you.

Ricardo.

--- "R.E. De Hoyos" <[email protected]> wrote:

> Ricardo,
>
> I guess you have three groups in your sample:
> cancerA, cancerB and other.
> You can fit an -mlogit- with these three categories
> to see if the
> independent variables have a different effect upon
> the likelihood of showing
> a particular disease.
>
> Once you have the coefficients into a single
> -mlogit- it is relatively easy
> to test Ho. of equality in parameters.
>
> I hope this helps,
>
> Rafa
>
>
> ----- Original Message -----
> From: "Ricardo Ovaldia" <[email protected]>
> To: <[email protected]>
> Sent: Monday, November 01, 2004 8:48 PM
> Subject: Re: st: Re: comparing OR (coefficients)
> across equations
>
>
> > --- "R.E. De Hoyos" <[email protected]> wrote:
> >
> >> Ricardo,
> >>
> >> According to the Statalist archives you have
> >> this question before
> >> (30/Aug/04) and received several informed
> replies.
> >>
> >>
> >
>
http://www.stata.com/statalist/archive/2004-08/msg00870.html
> >>
> >> Did I miss something?
> >
> > The difference is that in that situation I wanted
> to
> > compare coefficients computed from the same
> model(same
> > outcome & IV)applied to two different populations.
> For
> > my current question I have the same independent
> > variables but the outcome variables is different.
> Two
> > different cancers, same control group.
> >
> > I thing this is different, but I am not sure.
> Also, I
> > was wondering if -mhodds- would work in this case.
> > Note that I have both continuous and discrete
> > covariates.
> >
> > Thanks,
> > Ricardo.
> >
> >
> >
> >
> >
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=====
Ricardo Ovaldia, MS
Statistician
Oklahoma City, OK

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