Consensus Statement of the Academy of Nutrition and Dietetics/American Society for Parenteral and Enteral Nutrition
The Academy of Nutrition and Dietetics (the Academy) and the American Society for Parenteral and Enteral Nutrition (A.S.P.E.N.) recommend a standardized set of indicators be used to identify pediatric malnutrition (undernutrition) in clinical practice. These include weight-for-height/length, body mass index-for-age, or length/height-for-age or mid–upper arm circumference when a single data point is available.
When 2 or more data points are available, indicators may also include weight gain velocity (<2 years of age), weight loss (2–20 years of age), deceleration in weight for length/height z score, and inadequate nutrient intake. The full paper is here.