Issues in the assessment of nutritional status using anthropometry

Area of Science:

• Public Health
• Human Biology
• Growth Monitoring

Background:

• Anthropometry is vital for assessing population and individual health.
• Accurate interpretation of anthropometric data is essential for effective public health interventions.
• Existing methods for anthropometric analysis present several challenges.

Purpose of the Study:

• To discuss key issues in the use and interpretation of anthropometry.
• To provide criteria for assessing the severity of low anthropometry in populations.
• To highlight limitations in current growth references and data collection methods.

Main Methods:

• Comparative analysis of different anthropometric indices (weight-for-height, height-for-age, weight-for-age).
• Evaluation of various scales for index expression (z-scores, percentiles, percent-of-median).
• Discussion of limitations within the current WHO growth reference, particularly the age-2 disjunction.

Main Results:

• No single anthropometric index is universally adequate; selection depends on context.
• z-Scores offer superior properties for scaling anthropometric indices compared to percentiles or percent-of-median.
• A disjunction exists in growth curves at age 2 due to the use of different reference populations, necessitating careful interpretation.

Conclusions:

• Appropriate selection of anthropometric indices and scales is critical for accurate health assessments.
• Researchers must be aware of growth reference limitations, such as the age-2 disjunction, for correct interpretation.
• Standardized and carefully considered anthropometric data collection and analysis are fundamental for reliable public health surveillance.