TABLE 2.
Distribution of adolescent anthropometry and DXA measures at age 12 years
| Overall | Boys | Girls | ||||
|---|---|---|---|---|---|---|
| N | Mean (SD) or N (%) | N | Mean (SD) or N (%) | N | Mean (SD) or N (%) | |
| Anthropometry measures | ||||||
| Height‐for‐age z score | 255 | 0.47 (1.13) | 113 | 0.47 (1.18) | 142 | 0.47 (1.09) |
| Weight‐for‐age z score | 255 | 0.52 (1.25) | 113 | 0.33 (1.22) | 142 | 0.67 (1.25) |
| Normal/underweight | 255 | 169 (66.27) | 113 | 85 (75.22) | 142 | 84 (59.15) |
| Overweight (>1 SD)a | 255 | 69 (27.06) | 113 | 24 (21.24) | 142 | 45 (31.69) |
| Obesity (>2 SD)a | 255 | 17 (6.67) | 113 | 4 (3.54) | 142 | 13 (9.16) |
| BMI z score | 255 | 0.38 (1.20) | 113 | 0.18 (1.16) | 142 | 0.55 (1.20) |
| Waist circumference (cm) | 237 | 78.12 (13.88) | 105 | 75.71 (11.54) | 132 | 80.04 (15.26) |
| DXA measures | ||||||
| Body fat mass index z score | 237 | 0.23 (0.86) | 105 | 0.24 (0.74) | 132 | 0.22 (0.95) |
| Body fat mass percentage | 237 | 32.36 (7.07) | 105 | 29.70 (6.6) | 132 | 34.48 (6.71) |
| Body lean mass index z score | 237 | −0.32 (1.22) | 105 | −0.46 (1.15) | 132 | −0.21 (1.27) |
| Android fat percentage (%) | 237 | 29.79 (8.64) | 105 | 26.79 (7.52) | 132 | 32.17 (8.76) |
| Gynoid fat percentage (%) | 237 | 36.32 (6.58) | 105 | 33.34 (6.53) | 132 | 38.69 (5.60) |
| Android/gynoid fat percentage ratio | 237 | 0.81 (0.12) | 105 | 0.80 (0.11) | 132 | 0.82 (0.13) |
Abbreviation: DXA, dual‐energy x‐ray absorptiometry.
aOverweight and obesity are defined as having an age‐ and sex‐specific BMI z score >1 and >2 standard deviation scores, respectively, based on CDC Growth Charts [20].