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Subcutaneous fat remodelling in Southeast Asian infants and children
Insights
Childhood subcutaneous fat remodelling shows a shift from limbs to trunk with age. Weight and biological age influence this fat distribution, with trunk fat being a normal developmental feature in children.
Area of Science:
- Pediatrics
- Human Biology
- Child Development
Background:
- Subcutaneous fat distribution changes significantly during childhood.
- Understanding these changes is crucial for assessing child health and development.
Purpose of the Study:
- To analyze longitudinal changes in subcutaneous fat distribution in Thai children.
- To identify factors influencing fat remodelling during childhood.
Main Methods:
- Longitudinal study of 1,048 Thai children.
- Analysis of fat distribution using skinfold measurements (triceps and subscapular).
- Statistical analysis including stepwise regression and path analysis.
Main Results:
- Fat distribution shifted from limbs to trunk after infancy.
- Weight and biological age (bone age) were significant predictors of fat distribution.
- Weight was a major causal factor after infancy; biological age had a minor influence.
Conclusions:
- Trunk fat deposition is a normal aspect of childhood development.
- Current hypotheses linking elevated trunk fat to glucose metabolism disorders may not apply to younger children.
Abstract:
Longitudinal data on 1,048 Thai children were evaluated for evidence of subcutaneous fat remodelling. Fat distribution, as defined by 100 (triceps/[triceps + subscapular]), was more pronounced in the limbs during infancy but shifted toward the trunk thereafter. Subsequent stepwise regression analysis indicated that biological age--as measured by Gruelich-Pyle bone age--and weight together explained between 0.8% and 14.5% of variance in fat distribution, with generally larger R2 values over age and for males. Relationships were curvilinear, with sex differences in slope. Path analysis supported the model that weight was a major causal agent primarily after infancy, whereas biological age had a small influence both in infancy and in late childhood. These findings indicate that trunk fat deposition is a normal feature of childhood. They also suggest that hypotheses which associate elevated trunk fatness with disorders of glucose metabolism are invalid for younger children.