Mid-upper-arm circumference development and its validity in assessment of undernutrition

Area of Science:

• Pediatrics
• Public Health
• Anthropometry

Background:

• Childhood malnutrition remains a significant global health challenge.
• Accurate anthropometric measurements are crucial for early detection and intervention.
• Mid-upper-arm circumference (MUAC) is a widely used indicator for assessing nutritional status in children.

Purpose of the Study:

• To longitudinally observe the development of mid-upper-arm circumference (MUAC) in children.
• To evaluate the effectiveness of different MUAC cut-off levels for identifying moderate malnutrition across various age groups.
• To determine age-appropriate MUAC thresholds for malnutrition screening in children under five years.

Main Methods:

• Prospective, longitudinal study conducted in Hanoi, Vietnam, from 1981.
• Monthly MUAC, weight, and height measurements for the first year of life.
• Periodic measurements (3-monthly, 6-monthly, yearly) for children aged 12-72+ months.
• Statistical analysis to assess sensitivity and specificity of different MUAC cut-off values.

Main Results:

• Mid-upper-arm circumference (MUAC) shows distinct growth patterns: approximately 1 cm increase for boys and 1.5 cm for girls between 1 and 5 years.
• A MUAC cut-off of 13.5 cm demonstrated high sensitivity and specificity only for infants aged 6-12 months.
• Age-specific MUAC cut-off levels of 14.0 cm (13-24 months), 14.5 cm (25-36 months), and 15.0 cm (37-60 months) were found to be more appropriate.

Conclusions:

• A single MUAC cut-off point of 13.5 cm is inadequate for screening moderate malnutrition in all children under five.
• Age-specific MUAC thresholds are essential for accurate and effective malnutrition screening in diverse pediatric age groups.
• Implementing age-adjusted MUAC cut-offs can improve the early detection and management of childhood malnutrition.