Which children are underweight-for-age?

Underweight-for-age (or ‘low weight’) is defined as a weight for age that falls below the 3rd centile. This means that they weigh less than the normal range. Many of these children are ‘failing to thrive’. They appear clinically well and do not look undernourished. They do not have oedema. Unless they are weighed, and their weight is plotted on a centile chart, the diagnosis is frequently missed. Underweight-for-age is the commonest form of malnutrition.

Being underweight-for-age is the commonest form of malnutrition.

Using the Wellcome classification of PEM, children who are UWFA have a weight which is between 60 and 80% of the median (50th centile).

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