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Referral advice for head circumference

advice_hdc.Rd

This function traverses a decision tree for head circumference for children below the age of 1.

Usage

calculate_advice_hdc(
  sex = NA_character_,
  ga = NA,
  dob = NA_character_,
  dom = NA_integer_,
  y = NA,
  test_gain = TRUE,
  verbose = FALSE
)

Arguments

sex

Character, either "male" or "female"

ga

Gestational age, completed weeks (Integer or character)

dob

Date of birth (yyyymmdd). Required if dom is supplied as a date string.

dom

Vector with dates of measurements. Either supplied as age in decimal years or a date in the format yyyymmdd.

y

Head circumference (cm)

test_gain

Logical. Should the increase or decrease in Z-scores be tested? The default is TRUE.

verbose

Set to TRUE to obtain warnings on reference finding.

Value

calculate_advice_hdc returns an integer, the msgcode, between 3000-3999.

Details

The decision tree assesses both single and paired measurements. The observation corresponding to the oldest age is taken is the current measurement.

Author

Arjan Huizing, Stef van Buuren, 2020

Examples

msg(calculate_advice_hdc())
#> [1] "Voer het geslacht in."
msgcode <- calculate_advice_hdc(sex = "female",
                                dom = c(0.2491, 0.6653),
                                y = c(36, 40))
msg(msgcode)
#> [1] "Zeer kleine hoofdomtrek (< -2 SD), advies: Uit onderzoek blijkt dat een zeer kleine hoofdomtrek kan duiden op microcefalie. Dit kan een overweging zijn om het kind te verwijzen."