Table 1.
Descriptive characteristics of the study sample stratified by sex.
| Variables | N | All Mean (SD) | N | Boys Mean (SD) | N | Girls Mean (SD) | |||
|---|---|---|---|---|---|---|---|---|---|
| Age (years) | 469 | 9.2 | (0.6) | 251 | 9.3 | (0.6) | 218 | 9.2 | (0.6) |
| Weight (kg) | 424 | 37.3 | (10.1) | 235 | 37.7 | (10.3) | 187 | 37.0 | (9.8) |
| Height (cm)
BMI (kg/m2) |
410
410 |
140.5
18.6 |
(8.8)
(3.7) |
226
226 |
140.9
18.6 |
(8.7)
(3.7) |
182
184 |
140.2
18.5 |
(8.8)
(3.7) |
| WC (cm) | 423 | 67.2 | (10.0) | 235 | 67.7 | (10.5) | 188 | 66.7 | (9.2) |
| Sexual maturation status (%)
Stage 1 Stage 2 Stage 3 Stage 4 |
420 |
26.7 60.5 12.1 0.7 |
233 |
4.3 84.5 10.3 0.9 |
187 |
54.5 30.5 14.4 0.5 |
|||
| Cardiorespiratory fitness VO2max
(mL/kg per min) |
413 | 41.5 | (4.3) | 229 | 42.6 | (4.6) | 184 | 40.2 | (3.6) |
| 20-m shuttle run (stage) | 413 | 1.9 | (1.3) | 229 | 2.3 | (1.5) | 184 | 1.5 | (1.0) |
| Muscular fitness
Standing long jump (cm) Handgrip strength (kg) |
420 423 |
114.1 14.4 |
(22.4) (6.7) |
233 234 |
119.0 14.4 |
(20.3) (3.0) |
187 189 |
109.8 14.3 |
(19.1) (9.5) |
| Speed-agility4x10 shuttle run (s) | 419 | 14.8 | (2.3) | 232 | 13.7 | (1.4) | 187 | 14.2 | (1.3) |
| Frequency of active travel (nº/week) * | 469 | 4 | (0,9) | 251 | 4 | (0,9) | 218 | 4 (0,9) | |
| Mode of commuting º/week)
*
Walk Bike Car Motorcycle Bus Others |
469 |
4 (0,9) 0 (0,0) 4 (0,9) 0 (0,0) 0 (0,0) 0 (0,0) |
251 |
3(0,9) 0(0,0) 4(0,8) 0(0,0) 0(0,0) 0(0,0) |
218 |
4 (0,9) 0 (0,0) 5 (0,9) 0 (0,0) 0 (0,0) 0 (0,0) |
|||
| Distance to school (m) * |
324 | 600 (412,1000) | 163 | 650 (450,1000) | 161 | 600 (400,1000) | |||
Data are shown as mean and standard deviation, unless otherwise stated; BMI, Body mass index WC, Waist circumference; * Number of active travels to and from school per week (range: 0–10) and distance (m) expressed as Median (25th, 75th) percentile.