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st: RE: Royston's Conditional Growth Reference


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Royston's Conditional Growth Reference
Date   Wed, 4 Dec 2002 08:57:30 -0000

Zhiqiang Wang

> My colleague is seeking advice on Stata procedures for generating
> conditional growth intervals using the method described by
> Patrick Royston.
>
> Reference: Royston P(1995) Calculation of unconditional and
> conditional
> reference intervals for foetal size and growth from     longitudinal
> measurements. Statistics in Medicine 14:1417-1436.
>
> Data look like:
> id   age    weight
> 1    0        2.8
> 1    3        5.7
> 1    6        7.2
> 1    12      9.0
> 2    0        3.2
> 2    3        6.0
> 2    6        8.5
> 2    12       10.6
> ...
> Question is how to get standard deviation scores of
> achieved weight at each
> time point contional on previous weight.

See a series of inserts by Eileen Wright
and Patrick Royston in the STB.

. search wright, author

will yield the references. Otherwise
please note that Patrick is not
a member of Statalist.

Nick
n.j.cox@durham.ac.uk

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