Table 2. Characteristics of participants according to study variables.
| All participants | Boys | Girls | |||||||
|---|---|---|---|---|---|---|---|---|---|
| n = 360 | n = 176 | n = 184 | p † | ||||||
| Age (years) | Mean, SD | 8.5 | 0.4 | 8.5 | 0.4 | 8.6 | 0.4 | 0.410 | |
| Waist (cm) | 61.4 | 8.9 | 62.3 | 9.4 | 60.7 | 8.3 | 0.093 | ||
| Weight (kg) | 32.2 | 8.5 | 32.8 | 8.7 | 31.7 | 8.4 | 0.181 | ||
| Height (cm) | 131.4 | 6.3 | 132 | 6.3 | 130.9 | 6.3 | 0.109 | ||
| WHtR | 0.47 | 0.06 | 0.47 | 0.06 | 0.46 | 0.05 | 0.250 | ||
| BMI (kg/m2) | 18.4 | 3.7 | 18.6 | 3.7 | 18.3 | 3.6 | 0.337 | ||
| Wear time (hours) | 24 | 0.3 | 23.9 | 0.3 | 24 | 0.4 | 0.102 | ||
| Weekly PA (min/day) | |||||||||
| LPA | 218.2 | 33.4 | 212.5 | 33.3 | 223.6 | 32.7 | 0.001 | ||
| MPA | 70.6 | 21.5 | 76.8 | 23 | 64.7 | 18 | <0.001 | ||
| VPA | 15.6 | 9.2 | 19.9 | 10.5 | 11.4 | 5.1 | <0.001 | ||
| LMVPA | 304.7 | 52.4 | 309.7 | 55.4 | 299.9 | 49 | 0.075 | ||
| MVPA | 86,5 | 29.1 | 97.2 | 31.7 | 76.3 | 21.9 | <0.001 | ||
| Central obesity (WHtR ≥ 0.50) | n, % | 84 | 25.8 | 44 | 28.2 | 40 | 23.5 | 0.335 | |
| Children’s weight status (WHO) | |||||||||
| Normal weight | 160 | 49.1 | 71 | 45.5 | 89 | 52.4 | 0.349 | ||
| Overweight | 79 | 24.2 | 38 | 24.4 | 41 | 24.1 | |||
| Obesity | 87 | 26.7 | 47 | 30.1 | 40 | 23.5 | |||
| Children’s weight status (IOTF) | |||||||||
| Normal weight | 192 | 58.9 | 90 | 57.7 | 102 | 60 | 0.868 | ||
| Overweight | 77 | 23.6 | 37 | 23.7 | 40 | 23.5 | |||
| Obesity | 57 | 17.5 | 29 | 18.6 | 28 | 16.5 | |||
| Parent’s educational level | |||||||||
| Non-university | 182 | 55.5 | 87 | 55.4 | 95 | 55.6 | 0.979 | ||
| University | 146 | 44.5 | 70 | 44.6 | 76 | 44.4 | |||
| School status | |||||||||
| Public | 265 | 73.6 | 128 | 72.7 | 137 | 74.5 | 0.710 | ||
| Private | 95 | 26.4 | 48 | 27.3 | 47 | 25.5 | |||
Notes:
n, number of participants; SD, standard deviation.
†
p value for the difference between boys and girls (Mann-Whitney U test, t-test or chi-square), p < 0.05 in bold; WHtR, waist-to-height ratio; BMI, body mass index; L, light; M, moderate; V, vigorous; PA, physical activity.