[R] centile reference chart / clildren growth chart - what package/method to use

[roger koenker]

The lmsqreg package is by Vince Carey and is available from his
website.  There is an independent package with fortran routines from  
Tim Cole.
Both packages implement the LMS method of Cole and Green.  You might  
also
want to consider alternative methods:  an approach based on  
nonparametric
quantile regression is described in:

http://www.ncbi.nlm.nih.gov/sites/entrez? 
cmd=Retrieve&db=PubMed&list_uids=16143984&dopt=AbstractPlus

Some comparison with the LMS method are reported there.


url:    www.econ.uiuc.edu/~roger            Roger Koenker
email    rkoenker at uiuc.edu            Department of Economics
vox:     217-333-4558                University of Illinois
fax:       217-244-6678                Champaign, IL 61820


On Nov 8, 2007, at 10:16 AM, Niels Steen Krogh wrote:

> We are constructing growth charts (age/weight and age/length) for  
> children
> with diagnosis that impacts weight/length.
>
> But we we don't know how to use R for producing growth charts.
>
> We are collection data of Age, Weight and Length.
> The data are used to produce diagnosis-specific Growth charts (like  
> the CDC
> Growth Charts:
> http://www.cdc.gov/nchs/data/nhanes/growthcharts/set1clinical/ 
> cj41l017.pdf)
>
> Data-example is in the UsingR package as data(kid.weights).
>
> In the CDC-papers a LMS approch is described. Cole has programmed the
> methology (I guess) in a <R 2.0.0 package called lmsqreg:
> """
>> library(lmsqreg)
> Error in library(lmsqreg) :
> lmsqreg' is not a valid package -- installed < 2.0.0?)
> """
>
> Where to go forward in R.
> Thanks for any "hints".
> We are using R2.6.0 on win/linux
>
> /Niels
>
>
>
> Niels Steen Krogh
> Konsulent
> ZiteLab ApS
>
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