Overweight & Obese Children, Low Bone Mass
Overweight Children Study Aim
To determine whether girls and boys categorized from body mass index (BMI)
values as overweight or obese for their age have lower bone mineral content
(BMC) or lower bone area in relation to total body weight than children
of normal adiposity.
Overweight Children Study Subjects
200 girls and 136 boys aged 3-19 years recruited from the general population
by advertisement.
Overweight Children Study Measurements
Total body BMC (g) and bone area (cm2) measured by dual energy X-ray absorptiometry
(DXA) in relation to body weight (kg), lean tissue mass (kg) and fat mass
(kg) in boys and girls of three different BMI percentile groupings: normal
weight (BMI<85th percentile); overweight (85 to 94th BMI percentile);
obese (95th BMI percentile).
Overweight Children Study Results
Obese children had higher BMC, bone area, and fat mass for chronological
age than those of normal body weight. In spite of this the observed values
for age-adjusted total body BMC and bone area relative to body weight
were each lower than predicted values, in both overweight and obese children
(2.5-10.1% less) than in children of lower adiposity.
Overweight Children Study Conclusion
In overweight and obese boys and girls there is a mismatch between body
weight and bone development during growth: their bone mass and bone area
are low for their body weight.
Source: International Journal of Obesity
(2000)
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