Mid-Upper Arm Circumference Measurement in Children

Key Purposes of MUAC Measurement

The World Health Organization recommends MUAC as an alternative anthropometric tool for assessing malnutrition in children affected by conditions that make weight measurements unreliable, such as edema, ascites, steroid treatment, or large solid tumors 1, 2
MUAC measurements between 115-135 mm indicate moderate malnutrition, which is associated with an increased risk of mortality (adjusted OR of 1.73) in children with respiratory conditions 3, 4, 5
The American Academy of Pediatrics suggests that MUAC, when combined with triceps skin fold thickness, allows calculation of mid-arm fat and muscle area, providing valuable insight into body composition beyond what weight alone can indicate 1, 2
The Centers for Disease Control and Prevention recommends MUAC to identify children who require referral or closer monitoring in clinical settings, particularly those with respiratory conditions like pneumonia 3, 4, 5

For children with pneumonia, MUAC measurements between 115-135 mm indicate moderate malnutrition requiring consideration for referral or closer monitoring 3, 4, 5
MUAC should be expressed in relation to reference standards, typically as percentiles or standard deviation scores, to properly interpret a child's nutritional status 2

The National Institute of Nutrition recommends MUAC as a better indicator than weight for classification of acute malnutrition in children with fluid retention issues 1, 2
Unlike weight-for-age measurements, which can be affected by fluid status, MUAC provides a more reliable assessment of actual tissue mass 1, 2
MUAC can be measured by trained healthcare providers using standardized techniques with minimal equipment 1, 2

The European Society for Clinical Nutrition and Metabolism suggests that MUAC should be used alongside other nutritional assessment methods when possible, including clinical examination and laboratory indices 1, 2
Measurement techniques should be standardized and performed by trained individuals to ensure accuracy and reliability 1, 2

The World Health Organization (WHO) growth charts are recommended for children under 24 months of age, while the Centers for Disease Control and Prevention (CDC) growth charts are used for children 2 years and older, according to the American Academy of Pediatrics 6, 7
For a child just over 24 months, like a 2-year-2-month-old girl, WHO standards remain the most appropriate 6, 7
The American Academy of Pediatrics supports WHO growth standards for children under 24 months, recognizing the need for substantial educational measures for proper interpretation 6, 7

A MUAC of less than 115 mm typically indicates severe acute malnutrition, requiring immediate intervention 8

MUAC measurements should be repeated over time to assess trends rather than relying on single measurements, as recommended by the Centers for Disease Control and Prevention 7