查看文章

OBJECTIVES: 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.

DESIGN: Cross-sectional study in a university bone research unit.

SUBJECTS: Two hundred girls and 136 boys aged 3–19 y recruited from the general population by advertisement.

MEASUREMENTS: Total body BMC (g) and bone area (cm 2) 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).

RESULTS: Obese children had higher BMC, bone area, and fat mass for chronological age than those of normal body weight …