Table 1 Socioeconomic, family and school-related characteristics of adolescents by gender
| Â | Boys | Girls | P valuea |
|---|---|---|---|
N = 1256 (49.8%) | N = 1267 (50.2%) | ||
Anthropometric characteristics | |||
 BMI (kg/m2) | 21.5 (3.4) | 21.4 (3.2) | 0.5721 |
 Overweight/obesity (%) | 21.0 | 15.4 | 0.002* |
Socioeconomic characteristics | |||
 Social and professional class of the family head |  |  | 0.1949 |
  Executives, intermediate jobs, farmers, shopkeepers, craftsmen and managers | 694 (55.8) | 684 (54.4) |  |
  Employees and workers (unskilled or skilled) | 493 (39.6) | 496 (39.4) |  |
  Retired, inactive, unemployed | 57 (4.6) | 78 (6.2) |  |
 Family income level |  |  | 0.2162 |
  Low or average | 481 (39.1) | 516 (41.6) |  |
  High | 748 (60.9) | 725 (58.4) |  |
 Residence area |  |  | 0.0869 |
  Urban | 636 (51.7) | 597 (48.3) |  |
  Rural | 593 (48.3) | 639 (51.7) |  |
School-related characteristics | |||
 School type |  |  | <0.0001* |
  General and technological | 1 059 (84.3) | 1 156 (91.2) |  |
  Professional | 197 (15.7) | 111 (8.8) |  |
 Schooling placement |  |  | <0.0001* |
  Typical or advanced | 858 (68.3) | 958 (75.6) |  |
  Late | 398 (31.7) | 309 (24.4) |  |
 School boarding status |  |  | 0.1364 |
  Non-boarder | 243 (19.4) | 240 (19.0) |  |
  Half-boarder | 883 (70.4) | 922 (72.9) |  |
  Full-boarder | 129 (10.3) | 102 (8.1) |  |
Family characteristics | |||
 Family composition |  |  | 0.2392 |
  Two-parents | 1070 (86.0) | 1061 (84.3) |  |
  Single-parent | 174 (14.0) | 197 (15.7) |  |
 Perceived parental PA level |  |  | 0.6716 |
  Low or average | 661 (53.4) | 678 (54.3) |  |
  High | 576 (46.6) | 571 (45.7) |  |