Dear Maarten,
I grouped a continuous variable to define a disease, but not for
adjustment in the model. For example, diabetes is defined as HbA1c
>=6.5%. I did not quite understand your statement.
Minh
On Fri, Nov 9, 2012 at 9:09 PM, Maarten Buis <maartenlbuis@gmail.com> wrote:
> On Fri, Nov 9, 2012 at 10:08 AM, Pham Ngoc Minh wrote:
>> I got the solution after reading Gould's instructions . I meant to
>> create categorical but not indicator variables, actually.
>
> There is no difference: they are equally bad.
>
> -- Maarten
>
> ---------------------------------
> Maarten L. Buis
> WZB
> Reichpietschufer 50
> 10785 Berlin
> Germany
>
> http://www.maartenbuis.nl
> ---------------------------------
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