Re: Statistical Question

Posted by Hector Maletta on Aug 08, 2006; 10:00pm
URL: http://spssx-discussion.165.s1.nabble.com/Statistical-Question-tp1070190p1070193.html

More exactly, the odds are computed for each cateogyr relative to one
reference category which is chosen by default (usually the last one) but
there are several other contrasts to choose from.

Hector

-----Mensaje original-----
De: SPSSX(r) Discussion [mailto:[hidden email]] En nombre de
Albert-jan Roskam
Enviado el: Tuesday, August 08, 2006 5:51 PM
Para: [hidden email]
Asunto: Re: Statistical Question

Hi Brandon,

If you want to stratify the odds of e.g. having asthma
by educational level you could specify your education
variable as a categorical variable in your regression
model. You will see the odds relative to one reference
group, which is dependent on the way you sorted your
data.

Cheers!
Albert-Jan

--- Brandon Long <[hidden email]> wrote:

> This listserv is a great resource, so I was hoping
> someone might be able
> to help me get some clarification on a certain
> statistical question.  If
> you have risk-adjusted a sample of data by certain
> factors using
> logistic regression, is it incorrect to further
> stratify these results
> by some sort of grouping variable?  I do not believe
> it would be
> statistically correct but am having a hard time
> justifying this.  Am I
> wrong?  Any information would be helpful.
>
> Thank you!
>

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around
http://mail.yahoo.com