Whole group | Boys | Girls | Boys versus girls | ||||
---|---|---|---|---|---|---|---|
N | Mean (SD) | N | Mean (SD) | N | Mean (SD) | p-value | |
Socio-demographic | |||||||
Age (years) | 272 | 9.8 (1.4) | 133 | 9.8 (1.5) | 139 | 9.8 (1.4) | 0.86a |
Height (m) | 272 | 1.4 (0.1) | 133 | 1.4 (0.1) | 139 | 1.4 (0.1) | 0.81a |
Tanner stage | 272 | 133 | 139 | 0.22b | |||
No signs of puberty (%) | 71 | 74 | 68 | ||||
Signs of puberty (%) | 29 | 26 | 32 | ||||
PEL Level (≤3/4/5or 6) (%) | 263 | 32.7/14.8/52.5 | 128 | 28.1/14.4/57.8 | 135 | 35.0/15.6/47.4 | 0.22 b |
DXA: Whole body minus head | 272 | 133 | 139 | ||||
BMC (g) | 777 (177) | 770 (165.5) | 784 (188) | 0.79c | |||
BMC z-score | −0.20 (0.91) | −0.19 (0.91) | −0.20 (0.92) | 0.93a | |||
Areal BMD (g/cm2) | 0.68 (0.08) | 0.68 (0.07) | 0.68 (0.08) | 0.73a | |||
Areal BMD z-score | −0.17 (0.86) | −0.16 (0.83) | −0.18 (0.89) | 0.84a | |||
DXA: Whole body | 272 | 133 | 139 | ||||
Fat mass (g) | 8540 (3646) | 7313 (2816) | 9717 (3625) | <0.01c | |||
FMI (kg/m2) | 4.27 (1.54) | 3.65 (1.16) | 4.86 (1.62) | <0.01c | |||
Lean mass (g) | 24169 (4750) | 24522 (4401) | 23832 (5055) | 0.23a | |||
FFMI (kg/m2) | 12.09 (1.08) | 12.31 (0.96) | 11.88 (1.15) | <0.01c | |||
Nutrition | 264 | 130 | 134 | ||||
Dairy consumption (g/week) | 1953 (1159) | 2048 (1122) | 1861 (1190) | 0.19a | |||
Accelerometry | 210 | 105 | 105 | ||||
Sedentary time (%)d | 57.7 (7.3) | 56.9 (7.6) | 58.8 (6.9) | 0.09a | |||
Light PA (%)d | 34.6 (5.5) | 34.5 (5.7) | 34.5 (5.2) | 0.82a | |||
Moderate PA (%)d | 5.0 (1.9) | 5.7 (2) | 4.4 (1.5) | <0.01a | |||
Vigorous PA (%)d | 2.7 (1.8) | 2.9 (1.8) | 2.4 (1.7) | 0.01c | |||
MVPA (%)d | 7.7 (3.3) | 8.7 (3.5) | 6.7 (2.9) | <0.01a |