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Re: st: Z-scores of adult heights


From   "Austin Nichols" <austinnichols@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Z-scores of adult heights
Date   Mon, 21 Apr 2008 11:50:20 -0400

Richard Palmer-Jones <richard.palmerjones@gmail.com>:
I think any suggestions would have to be conditional on what the
scores are to be used for.  I would be inclined to condition only on
sex, since differences by race/ethnicity may be conflated with
differences by income.  Also, are these age or cohort effects? Or
both?

webuse nhanes2
lpoly hei age if race==1 & sex==1
tw kdensity hei if race==1&sex==1&ageg==2||kdensity hei if
race==1&sex==1&ageg==5

Also note that you might want to use rank (on the interval 0,1)
directly, rather than a Z score, depending on your model...

On Mon, Apr 21, 2008 at 11:20 AM, Richard Palmer-Jones
<richard.palmerjones@gmail.com> wrote:
> Dear Readers
>
> I want to calculate z-scores of adult male and female heights of
> different ages using reference population standards (e.g. healthy
> western populations). This is readily done for children, but I am not
> clear what distribution parameters to use for adults. I can see some
> debate about changing adult heights in western populations, and also
> differences by ethnicity and income, so population parameters (such as
> from NHANES) would not seem suitable.
>
> All suggestions welcome.
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