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Table 1 Anthropometry and body composition parameters determined by dual-energy X-ray absorptiometry (DXA)

From: Bioelectrical impedance analysis to estimate body composition, and change in adiposity, in overweight and obese adolescents: comparison with dual-energy x-ray absorptiometry

  Boys (n = 30) Girls (n = 36) Total (n = 66) P a
Age 12.90 ± 1.95 12.86 ± 2.14 12.88 ± 2.04 0.939
Pubertal status n (%) Tanner stage ≥ 3 16 (53.3%) 26 (74.3%) 42 (64.6%) 0.078c
Anthropometry
Height (cm) 165.5 ± 11.8 160.4 ± 9.1 162.8 ± 10.6 0.052
Height z-score 1.52 ± 1.57 1.21 ± 1.24 1.35 ± 1.39 0.373
Weight (kg) 95.20 ± 20.7 84.17 ± 19.4 89.2 ± 20.5 0.028
Weight z-score 3.31 ± 0.71 3.19 ± 0.91 3.24 ± 0.82 0.541
BMI 34.5 ± 5.5 32.5 ± 5.9 33.4 ± 5.8 0.149
BMI z-score 3.27 ± 0.51 2.98 ± 0.66 3.11 ± 0.61 0.057
Obese n (%)b 28 (93.3%) 31 (86.1%) 59 (89.4%) 0.343c
Overweight n (%)b 2 (6.7%) 5 (13.9%) 7 (10.6%)  
Reference body composition (DXA)
Fat mass (kg) 41.79 ± 11.27 40.67 ± 12.69 41.18 ± 12.00 0.708
Fat-free mass (kg) 52.94 ± 13.26 42.81 ± 7.71 47.42 ± 11.67 0.001
Bone mineral content (kg) 2.75 ± 0.65 2.62 ± 0.67 2.67 ± 0.66 0.430
Total body fat % 45.37 ± 8.00 49.30 ± 6.63 47.51 ± 7.49 0.033
  1. Results are presented as mean ± standard deviation unless otherwise indicated.
  2. aP sex differences determined by independent sample t-test unless otherwise indicated.
  3. bOverweight and obese defined by IOTF BMI criteria [9].
  4. cPearson Chi-Square test.