targetheight: Target Height Calculation for Dutch Population

In growthcharts/growthscreener: Finding Children with Unusual Growth Patterns

Target Height Calculation for Dutch Population

Description

This function calculates the target height of a child based on the height of the biological parents, using the method proposed by Hermanussen & Cole (2003) with a simplified formula for the Dutch population.

Usage

targetheight(hgtf, hgtm, sex, etn = NULL)

Arguments

hgtf	Numeric vector with the height of the biological father in cm. Can include NA for unknown heights.
hgtm	Numeric vector with the height of the biological mother in cm. Must have the same length as hgtf.
sex	Character vector indicating the sex of the child for which target height is calculated. Must be either "male" or "female".
etn	Ethnicity. Not used in this function, but included for consistency with other functions.

Details

For more details, see Van Dommelen et al. (2012). The formulas are as follows:

For boys:

TH = 44.5 + 0.376 * hgtf + 0.411 * hgtm

For girls:

TH = 47.1 + 0.334 * hgtf + 0.364 * hgtm

If the height of the biological father is unknown, we use:

For boys:

TH = 99.9 + 0.492 * hgtm

For girls:

TH = 96.3 + 0.436 * hgtm

If the mother's height is unknown, the function returns NA as the target height cannot be calculated.

Value

A data.frame with three columns:

y

The calculated target height in cm.

y.sd

The standard deviation of the error term in cm.

z

The target height in SDS, relative to the child reference.

References

Hermanussen M, Cole TJ (2003). "The Calculation of Target Height Reconsidered." Hormone Research, 59, 180–183.

Van Dommelen P, Schonbeck Y, Van Buuren S (2012). "A simple calculation of the target height." Archives of Disease in Childhood, 97, 182.

See Also

hermanussencole

Examples

## Not run: 
# Example: Target height for Dutch children with father height 180 cm and
# mother height 170 cm
# For both a boy and a girl
targetheight(hgtf = c(180, 180), hgtm = c(170, 170), sex = c("male", "female"))

# Handling missing father height
targetheight(hgtf = c(NA, 180), hgtm = c(171, NA), sex = c("male", "male"))

## End(Not run)

growthcharts/growthscreener documentation built on Oct. 25, 2024, 4:07 p.m.