| | Variable | All median (IQR) | Boys median (IQR) | Girls median (IQR) | P for sex difference |
| | Age (years) | 7.5 (7.2, 7.8) | 7.4 (7.2, 7.8) | 7.6 (7.2, 7.8) | 0.53 | | Height (cm) | 125 (122, 129) | 126 (122, 130) | 125 (121, 128) | 0.09 | | Shoulders (mm) | 279 (269, 291) | 279 (270, 291) | 278 (268, 290) | 0.51 | | Elbow (mm) | 52 (49, 54) | 52 (50, 55) | 51 (49, 53) | 0.001 | | Wrist (mm) | 42 (41, 45) | 43 (41, 45) | 42 (40, 44) | 0.07 | | Hip (mm) | 203 (194, 213) | 202 (194, 213) | 204 (195, 214) | 0.35 | | Knee (mm) | 77 (74, 80) | 78 (75, 82) | 75 (73, 79) | <0.0001 | | Waist (cm) | 55.9 (53.0, 59.3) | 56.4 (53.3, 58.8) | 55.4 (52.5, 59.6) | 0.14 | | Subscapular skinfold (mm) | 6.6 (5.3, 9.6) | 5.8 (4.9, 8.2) | 7.7 (5.9, 10.5) | <0.0001 | | Triceps skinfold (mm) | 10.5 (8.3, 13.4) | 9.0 (7.3, 11.7) | 11.6 (9.7, 14.3) | <0.0001 | | Biceps skinfold (mm) | 6.1 (4.7, 8.2) | 5.5 (4.4, 7.3) | 6.7 (5.4, 8.7) | <0.0001 | | Suprailiac skinfold (mm) | 7.9 (5.5, 11.9) | 6.7 (5.0, 10.1) | 9.5 (6.1, 14.0) | <0.0001 | | Fat mass score | 0.44 (0.00, 0.94) | 0.54 (0.06, 1.01) | 0.39 (−0.03, 0.83) | 0.06 | | Lean mass score | −0.20 (−0.80, 0.48) | −0.30 (−0.89, 0.34) | −0.07 (−0.68, 0.56) | 0.01 | | BMI (kg/m2) | 16.3 (15.2, 17.8) | 16.2 (15.3, 17.5) | 16.5 (15.2, 18.0) | 0.18 |
|
|
