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HK J Paediatr (New Series)
Vol 15. No. 4,
2010
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HK J Paediatr (New Series) 2010;15:276-284
Original Article
The Association Between Adiposity and Bone Mineral Density in Chinese Children
HS Lam, AM Li, DFY Chan, J Yin, E Wong, RYT Sung, EAS Nelson Department of Paediatrics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China HS Lam (林鴻生) MBBChir, FHKCPaed, FHKAM(Paed) AM Li (李民瞻) MD, FHKCPaed, FHKAM(Paed) DFY Chan (陳鳳英) MBChB, FHKCPaed, FHKAM(Paed) J Yin (殷愛珍) MSc RYT Sung (宋銀子) MD, FHKCPaed, FHKAM(Paed) EAS Nelson (倪以信) MD, FHKCPaed, FHKAM(Paed) Centre for Epidemiology and Biostatistics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China E Wong (黃銘聰) BSc, MA Correspondence to: Dr HS Lam Received August 18, 2010
Abstract Purpose: To investigate the association between bone mineral density (BMD) and anthropometric and body compositional characteristics in obese Chinese children. Methods: 100 obese children (73 boys and 27 girls) were recruited (age range 9 to 17 years, median BMI 31 kg/m2). All children underwent dual- energy X-ray absorptiometry to measure body composition and BMD and bone mineral apparent density (BMAD) of the whole body, lumbar vertebrae and femoral neck. Findings: Percentage total body fat and BMI were useful predictors for BMD in boys. Increasing % ideal BMI was associated with increases in all BMD values (P<=0.001) except femoral neck BMAD z score (P=0.113). Increasing percentage body fat was associated with decreases in all BMD values (P<=0.002), except for femoral neck BMAD z score (P=0.058). Data for girls were insufficient for multivariate analyses. Conclusion: Increasing adiposity is associated with decreased BMD and BMAD in obese boys. Conversely, in this group, increasing body size, when corrected for % body fat was associated with increasing BMD and BMAD. Abstract in Chinese
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