who_ref_data: WHO Reference Data

who_ref_dataR Documentation

WHO Reference Data

Description

LMS parameters (L, M, S) in the WHO charts for age- and sex-standardized growth metrics.

Usage

data(who_ref_data)

Format

A data.table with columns for sex (sexn coded as 1 (boys) / 2 (girls)), age in days, and LMS values. Variable names represent the weight (wei), length or height (len), BMI (bmi), weight-for-length (wfl), or head circumference (headc). This prefix is followed by '_' and then by 'l', 'm', or 's' representing the LMS parameters.

Sexn is coded as '1' (boys) and '2' (girls).

In contrast to the sex- and age-standardized metrics, weight-for-length is weight standardized for sex and length; it represents the distribution of weights for a specific length. Note that the length/height reference values are given in 0.01 cm increments.

The 'denom' variable indicates if the row represents age-standardization or len-standardization.

Source

https://www.who.int/toolkits/child-growth-standards/standards


cdcanthro documentation built on Oct. 31, 2026, 1:07 a.m.