Data from the fourth dutch growth study in 1997.
A data frame with 6848 observations on the following 10 variables.
age in decimal years
length/height in cm
weight in kg
head circumference in cm
z-score head circumference
z-score body mass index
z-score height for weight
z-scores were calculated relative to the Dutch references.
The Fourth Dutch Growth Study is a cross-sectional study that measures growth and development of the Dutch population between ages 0 and 21 years. The study is a follow-up to earlier studies performed in 1955, 1965 and 1980, and its primary goal is to update the 1980 references.
van Buuren S and Fredriks A (2001) Worm plot: A simple diagnostic device for modeling growth reference curves Statistics in Medicine, 20:1259-1277
Schnabel S and Eilers P (2009) Optimal expectile smoothing Computatational Statistics and Data Analysis, 53: 4168-4177
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Loading required package: parallel Loading required package: mboost Loading required package: stabs This is mboost 2.8-1. See 'package?mboost' and 'news(package = "mboost")' for a complete list of changes. Loading required package: BayesX Loading required package: shapefiles Loading required package: foreign Attaching package: 'shapefiles' The following objects are masked from 'package:foreign': read.dbf, write.dbf Note: Function plotsurf depends on akima which has a restricted licence that explicitly forbids commercial use. akima is therefore disabled by default and may be enabled by akimaPermit(). Calling this function includes your agreement to akima`s licence restrictions.
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