get_lhfa_pchart: Extract length/height-for-age percentiles data

In nutriverse/nutricheckr: Tools for Nutrition Assessment and Analysis

Extract length/height-for-age percentiles data

Description

Function to extract length/height-for-age percentiles data from the World Health Organization (WHO) website on Child Growth Standards http://www.who.int/childgrowth/standards/" which contains a collection of reference data from the WHO Multicentre Growth Reference Study (MGRS). This function extracts the expanded data provided by WHO for creating growth charts for length/height-for-age percentiles.

Usage

get_lhfa_pchart(
  baseurl = "http://www.who.int/childgrowth/standards/",
  gender = c("boys", "girls")
)

Arguments

baseurl	Character value for the base URL of the WHO Child Growth Standards. The default is http://www.who.int/childgrowth/standards/. This can be adjusted should WHO change the base URL for the Child Growth Standards section of their website.
gender	A character value or vector that specifies the sex-specific reference data to extract. The default is c("boys", "girls").

Value

A data frame in tidy format with 8 coloumns and 55710 rows:

sex

Sex of child. 1 = boy; 2 = girl

month

Age of child in months. This is calculated from the original data using that data for age of child in days

day

Age of child in days. This is provided for by default in the original data

l

L component of the LMS method for normalising growth centile standards. L is the trend in the optimal power to obtain normality

m

M component of the LMS method for normalising growth centile standards. M is the trend in the mean

s

S component of the LMS method for normalising growth centile standards. S is the trend in the coefficient of variation

p_type

Type of z-score. Can be one of 0.10th, 1st, 3rd, 5th, 10th, 15th, 25th, 50th, 75th, 85th, 90th, 95th, 97th, 99th and 99.9th

p_value

Length/height value for the specified p_type

Author(s)

Ernest Guevarra

Examples

# Get length/height-for-age percentile expanded tables for charting
#get_lhfa_pchart()

nutriverse/nutricheckr documentation built on April 1, 2022, 7:44 p.m.