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[Differences between reference charts of weight in children up to the age of 18 months]
A Ayerza Casas1, G Rodríguez Martínez, Ma P Samper Villagrasa
1Hospital Clínico Universitario Lozano Blesa, and Growth, Exercise, Nutrition and Development Research Group, Departamento de Pediatría, Radiología y Med. Física, Universidad de Zaragoza, Zaragoza, Spain.
Insights
Choosing the right growth chart is crucial for accurately assessing infant weight. Different population standards significantly impact the interpretation of infant growth metrics up to 18 months.
Area of Science:
- Pediatric Endocrinology
- Nutritional Assessment
- Growth Monitoring
Context:
- Infant growth is a key indicator of nutritional status in pediatrics.
- Accurate growth assessment is vital for early detection of nutritional deficiencies or excesses.
Purpose:
- To compare infant weight analysis using different population reference standards.
- To evaluate the impact of chosen growth curves on infant weight classification.
Summary:
- A longitudinal study analyzed the weight of 383 infants from birth to 18 months using five different growth curves.
- Significant variations in weight z-scores and the percentage of infants falling below standard weight parameters were observed depending on the reference used.
- Differences became more pronounced from 6 months onwards, highlighting the importance of standard selection.
Impact:
- Demonstrates that infant weight assessment outcomes vary based on the population standard applied.
- Highlights potential misclassification of infant nutritional status if inappropriate growth references are used.
- Underscores the need for careful consideration and selection of appropriate growth standards in pediatric practice.
Introduction:
Growth is a complex phenomenon that has in pediatric age special relevancy because it constitutes a fundamental indicator of nutritional status.
Objective:
To evaluate differences about weight analysis of infants aged 0-18 months depending on the population reference used.
Methods:
This is a longitudinal weight and length study in a representative sample of 383 infants from Aragon since birth until 18 months of age. A descriptive analysis was realized and "z-scores" were calculated from five growth curves. Finally there was calculated the percentage of children who were staying above or under 2DS for weight depending on the standard used.
Results:
50.1% were males and 49.9% women. Weight and length of the children were higher in girls than in boys in all the ages (p<0.01). Major differences between weight z-score averages from standards were at 6 months and later. The percentage of children on a weight<2 DS ranged between 0.5 and one 3.3% at 18 months of age depending on the standard.
Conclusion:
Global differences exist when weight is evaluated in the same sample of infants up to 18 months of age depending on different population standards, as well as in the number of children who stay out of the limits of the normality with each of them.
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