FANTA has constructed Excel files containing Anthropometric Tools: WHO/NCHS Reference Tables for Children. The easy to read tables have under five weight for age, height for age and weight for height median, -1, -2 and -3 standard deviation information that can be used to compute Z-scores.
The compilation was done to have accessible reference data that are often used to analyze individual and batch data. Software such as EPINUT from CDC contains these reference values.
References are used to standardize a child's measurement by comparing the child's measurement with the median or average measure for a reference population of healthy children of the same age and sex. When describing differences from the reference, a standardized numeric value must be used to enable children of different ages and sex to be compared. Taking age and sex into consideration, differences in measurements can be expressed a
number of ways, however USAID recommends that calculations use
standard deviation units (or Z-scores) as a basis for comparison.
The reference standards most commonly used to standardize
measurements were developed by the US National Center for
Health Statistics (NCHS) in 1978 and are recommended for
international use by the World Health Organization. The reference
population chosen by NCHS was a statistically valid random
population of healthy infants and childre