calculate_th: Calculate target height SDS for a single child

In growthcharts/growthscreener: Finding Children with Unusual Growth Patterns

Calculate target height SDS for a single child

Description

calculate_th() 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. The function is not vectorized, so it only works for a single child at a time. Optionally, it can calculate the target height based on the height of the mother only, although this only works for the Dutch population.

Usage

calculate_th(
  hgtf,
  hgtm,
  sex = NULL,
  etn = NULL,
  support_missing_hgtf = FALSE,
  dec = c(1L, 3L, 3L)
)

Arguments

hgtf	Length of biological father (cm)
hgtm	Length of biological mother (cm)
sex	Character, either "male" or "female". If omitted, the functions returns c(NA, NA).
etn	Ethnicity, one of "NL" (dutch), "TU" (turkish), "MA" (moroccan) or "HS" (hindustani). If omitted, the functions returns c(NA, NA).
support_missing_hgtf	Logical, if TRUE and hgtf is missing, the function will calculate the target height based on hgtm only. This will work only for the Dutch population. If hgtm is missing, the function will always return NA. The default is support_missing_hgt = FALSE.
dec	Integer vector, length 2, indicating rounding for th and th_z, respectively

Value

 Numeric, length 3: 1) target height (cm), 2) target height

prediction error and 3) target height SDS.

Author(s)

 Stef van Buuren, 2019, 2024

Examples

calculate_th(180, 170, "male", "NL")
calculate_th(NA, 170, "male", "NL", support_missing_hgtf = TRUE)

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