SOURCE
World Development Indicators database

DEFINITION
Prevalence of child malnutrition (height for age) is the percentage of children under five whose height for age is more than two standard deviations below the median for the international reference population ages 0 to 59 months. For children up to two years of age, height is measured by recumbent length. For older children, height is measured by stature while standing. The reference population adopted by the WHO in 1983, is based on children from the United States, who are assumed to be well nourished.