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Re: st: Binary and ologit

From   Maarten Buis <[email protected]>
To   [email protected]
Subject   Re: st: Binary and ologit
Date   Tue, 31 Jul 2012 18:32:52 +0200

The easiest way is to combine the chronic an acute into diseased and
use a binary logit. So, say you have one variable --- lets call it
status --- with 4 categories: 0 healty, 1 diseased (cattle only), 2
acute (sheap only), 3 chronic (sheap only). Than you can first create
a new variable:

recode status (2=1) (3=1) , gen(newstatus)

and use that as response in your logit command.

Hope this helps,

On Tue, Jul 31, 2012 at 6:08 PM, Shittu, Aminu wrote:
> The type of response in this multivariable data looks pretty strange to me. In the data, there is only one diagnosis of disease in cattle, but in sheep it was categorised as either acute or chronic based on laboratory confirmation. Binary logistic regression will work well for sheep, if we are to drop the cattle specie. It will be ordered logit (acute, chronic or disease) if we are to work with both (cattle and sheep), but cattle belongs to one category of response so I was wondering on the kind of modelling approach should I use if both species of animals are to be included in the model?
> Yours,
> Aminu.
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Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen

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