While recording the weight of a 2-year-old boy on the WHO growth chart, a nurse notes that the weight curve is below -2 SD. The nurse interprets this as:

1. A

   overweight for his age

2. B

   under nutrition

3. C

   severely underweight

4. D

   normal weight for his age

Appeared in: AIIMS Jodhpur SNO-2023

Explanation

• According to WHO Child Growth Standards, a weight-for-age Z-score below -2 SD is classified as 'Underweight'.
• Being underweight is a direct and significant indicator of undernutrition, which means the child is not receiving adequate nutrients for healthy growth.
• The nurse's role is to interpret this chart finding as a sign of a nutritional problem that requires further assessment and intervention.
• The term 'under nutrition' correctly describes the underlying condition that leads to the observed low weight.

Why Other Options Were Wrong

• Option A: Overweight is incorrect. This status is indicated by a weight-for-age Z-score above +2 SD, which is the opposite of the finding in the question.
• Option C: Severely underweight is a more extreme classification. It is defined by a weight-for-age Z-score below -3 SD. The question only states the value is below -2 SD, which falls into the 'underweight' category.
• Option D: Normal weight is incorrect. The normal range for weight-for-age is between -2 SD and +2 SD. The child's weight is below this range.

Related Visual

• Visual 1: Diagram - A WHO weight-for-age growth chart for boys. The chart should clearly show the median line (0) and the Z-score lines for +2, -2, and -3 SD. An arrow can point to the area below the -2 SD line, labeled 'Underweight (Undernutrition)'.

Clinical Relevance

• Nursing practice connection: Use the key finding related to Interpretation of WHO growth charts and Z-scores for nutritional assessment to guide bedside assessment, documentation, and the next nursing action.
• Growth monitoring is a fundamental nursing responsibility in pediatric care. Accurately plotting and interpreting growth charts allows for early identification of nutritional problems and timely intervention.
• Undernutrition in early childhood (the first 1000 days) can lead to irreversible consequences, including stunting, impaired cognitive development, and increased susceptibility to infections.
• What if? If the growth curve was previously normal but is now flattening and crossing downwards through the percentile lines, even if it's still above -2 SD, it indicates growth faltering. This is an early warning sign that requires immediate investigation and intervention to prevent the child from becoming underweight.

How to Approach the Question

• First, identify the key information in the question: the child is a 2-year-old boy, and his weight curve is 'below -2 SD' on the WHO growth chart.
• Recall the standard classifications for Z-scores on the WHO weight-for-age chart.
• A score below -2 SD is defined as 'Underweight'.
• A score below -3 SD is defined as 'Severely Underweight'.
• A score between -2 SD and +2 SD is 'Normal'.
• A score above +2 SD is 'Overweight'.

Concept Tested & Keywords

• Concept Tested: Interpretation of WHO growth charts and Z-scores for nutritional assessment.
• Stem keywords: WHO growth chart, weight curve, 2-year-old boy, below -2 SD
• Lead-in keywords: interprets this as
• Clinical cues: The key clinical finding is a weight curve below the -2 SD line, which is a definitive marker for being underweight.

Question ID

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