dutchboys: Data set about the growth of dutch children

dutchboysR Documentation

Data set about the growth of dutch children

Description

Data from the fourth dutch growth study in 1997.

Usage

data(dutchboys)

Format

A data frame with 6848 observations on the following 10 variables.

defnr

identification number

age

age in decimal years

hgt

length/height in cm

wgt

weight in kg

hc

head circumference in cm

hgt.z

z-score length/height

wgt.z

z-score weight

hc.z

z-score head circumference

bmi.z

z-score body mass index

hfw.z

z-score height for weight

z-scores were calculated relative to the Dutch references.

Details

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.

Source

van Buuren S and Fredriks A (2001) Worm plot: A simple diagnostic device for modeling growth reference curves Statistics in Medicine, 20:1259-1277

References

Schnabel S and Eilers P (2009) Optimal expectile smoothing Computatational Statistics and Data Analysis, 53: 4168-4177

Examples

data(dutchboys)

expreg <- expectreg.ls(dutchboys[,3] ~ rb(dutchboys[,2],"pspline"),smooth="f",
                       estimate="restricted",expectiles=c(.05,.5,.95))
plot(expreg)

expectreg documentation built on March 18, 2022, 5:57 p.m.