R help - Aug 2009 - Quick explanation of model output

Hi,

Been running the lrm model from the Design package. (Thanks Frank!)

There are some output columns that I don't quite understand.

What is "Wald Z" and then "P" which is 0 for all rows???

-----------------------------------------------
                Coef   S.E.   Wald Z P
Intercept -2.797 0.0431 -64.90 0
val1          3.003 0.1347  22.30 0
val2          4.882 0.1632  29.91 0
-----------------------------------------------

Thanks!!!

-N

On Aug 21, 2009, at 9:46 PM, Noah Silverman wrote:
> Hi,
>
> Been running the lrm model from the Design package. (Thanks Frank!)
>
> There are some output columns that I don't quite understand.
>
> What is "Wald Z" and then "P" which is 0 for all
rows???
Wald Z would be the square root of Wald chi-square, and P would be ...
the P value, what else?
>
> -----------------------------------------------
>               Coef   S.E.   Wald Z P
> Intercept -2.797 0.0431 -64.90 0
> val1          3.003 0.1347  22.30 0
> val2          4.882 0.1632  29.91 0
> -----------------------------------------------
>

David Winsemius, MD
Heritage Laboratories
West Hartford, CT