Ann Pediatr Endocrinol Metab.  2024 Apr;29(2):119-129. 10.6065/apem.2346122.061.

Predictive factors of bone strength variation in adolescent girls according to body composition

• Khwanchuea R

• KMID: 2554683
• DOI: http://doi.org/10.6065/apem.2346122.061

Abstract

Purpose
This study examined correlations among anthropometric parameters, body composition, bone parameters and predictive factors of bone mass in adolescent girls with different body fat percentages (%fat).
Methods
A total of 129 females aged 15–18 years were categorized into 3 groups using %fat-for-age at the 50th and 95th percentiles as cutoff points (normal, over, and excess %fat groups). We recorded anthropometric data and measured the speed of sound at the tibia and radius using quantitative ultrasound. Dual-energy x-ray absorptiometry (DXA) was used to measure body composition and bone parameters, including bone mineral density (BMD), bone mineral content (BMC), and the BMD-z-score (z-score) in the lumbar spine (LS) and whole body (WB). These parameters were compared among the 3 groups using bivariate and multivariate correlation analyses.
Results
There were strong correlations among all anthropometric parameters, body composition, and DXA in the over %fat group. Lean parameters strongly correlated with LS and WB in the normal %fat group, whereas both lean mass (LM) and fat mass (FM) were positively correlated with BMC in the excess %fat group. The predictive factors of bone mass differed among the groups, as follows: lean body mass was predictive of BMD and BMC at both sites in the normal and over %fat groups; LM and body weight were predictive of LS-BMC and WB-bones, respectively, in the over %fat group; and FM was predictive of WB-bones in the excess %fat group. Body fat and waist circumference were negative predictors of bone mass.
Conclusion
Predictive factors of bone strength appear to depend on the amount of body fat in adolescent girls.

Keyword

Body fat percentage; Lean mass; Fat mass; Bone; Girl

Figure

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  Fig. 1. Flowchart of the study. QUS, quantitative ultrasound; DXA, dual-energy x-ray absorptiometry; %Fat, body fat percentage.

Reference

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