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Re: st: test for trend of an ordinal predictor


From   Richard Goldstein <richgold@ix.netcom.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: test for trend of an ordinal predictor
Date   Mon, 26 Apr 2010 08:44:36 -0400

it is not exactly clear what you want here, but you may find the
-cascade- program helpful; you can find this using -findit cascade-; the
original stb article for this can be found at
www.stata.com/products/stb/journals/stb6.html

Rich

On 4/26/10 8:31 AM, Georgia wrote:
> Hi there,
> 
> I am fitting a regression model with a normally distributed outcome (y)
> and an ordinal variable in 3 levels (x) as predictor. Obviously, when I
> use the command
> 
> xi: regress y i.x
> 
> I get separate coefficients for the second and the third level of the
> predictor while the first level is treated as reference. However, I
> would be very interested in testing the trend of the ordinal variable.
> In such a case, do I simply treat my ordinal var as a continuous one by
> typing
> 
> regress y x
> 
> or is there  a better way to test the trend of x? I would appreciate any
> help on this.
> 
> Georgia
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