Table 1. Sample characteristics by gender.
| Variable | All | Boys | Girls | ||||||
|---|---|---|---|---|---|---|---|---|---|
| % | n | % | n | % | n | ||||
| Age range | |||||||||
| 14–16 years | 42.0 | 1,766 | 35.4 | 598 | 46.4 | 1,165 | |||
| 17–19 years | 58.0 | 2,441 | 64.6 | 1,089 | 53.6 | 1,346 | |||
| School shift | |||||||||
| Daytime (morning/afternoon) | 57.6 | 2,414 | 53.9 | 908 | 60.0 | 1,506 | |||
| Nighttime | 42.4 | 1,780 | 46.1 | 778 | 40.0 | 1,002 | |||
| Maternal schooling | |||||||||
| ≤8 | 72.5 | 2,865 | 69.4 | 1,086 | 74.5 | 1,771 | |||
| 9–11 | 21.1 | 833 | 22.5 | 352 | 20.2 | 480 | |||
| ≥12 | 6.4 | 253 | 8.1 | 127 | 5.30 | 126 | |||
| Ethnicity | |||||||||
| Caucasian | 25.2 | 1,057 | 24.8 | 417 | 25.5 | 639 | |||
| Non-Caucasian | 74.8 | 3,136 | 75.2 | 1,262 | 74.5 | 1,866 | |||
| Geographic region | |||||||||
| Metropolitan | 41.8 | 1,757 | 39.8 | 670 | 43.2 | 1,084 | |||
| Forest area | 17.7 | 743 | 18.1 | 306 | 17.3 | 434 | |||
| Semi-arid | 40.6 | 1,707 | 42.1 | 711 | 39.5 | 993 | |||
| Residence area | |||||||||
| Urban | 79.0 | 3,294 | 78.1 | 1,311 | 79.5 | 1,983 | |||
| Rural | 21.0 | 877 | 21.9 | 367 | 20.5 | 510 | |||
| School size | |||||||||
| Small | 8.9 | 376 | 9.0 | 152 | 8.80 | 221 | |||
| Medium | 25.8 | 1,084 | 27.0 | 456 | 25.0 | 628 | |||
| Large | 65.3 | 2,747 | 64.0 | 1,079 | 66.2 | 1,662 | |||
| Employment status | |||||||||
| Unemployed | 78.5 | 3,276 | 69.2 | 1,157 | 84.8 | 2,119 | |||
| Employed | 21.5 | 895 | 30.8 | 514 | 15.2 | 381 | |||
| Low level of physical activity | 65.1 | 2,731 | 57.5 | 971 | 70.2 | 1,754 | |||
| Exposure to sedentary behavior | 18.7 | 782 | 16.5 | 277 | 20.2 | 504 | |||
| Occasional consumption of fruit and/or vegetables | 51.4 | 2,145 | 53.5 | 893 | 50.0 | 1,248 | |||
| Alcohol consumption | 30.4 | 1,273 | 38.6 | 648 | 24.8 | 622 | |||
| Smoking | 7.6 | 320 | 9.8 | 165 | 6.2 | 155 | |||