Table 1 Characteristics of participants according to age group, sex, and sexual activity: mean (standard error).
15 to 18 years old | ||||
|---|---|---|---|---|
Boys | Girls | |||
Not active | Active | Not active | Active | |
Age (years) | 16.33 (0.03) | 17.01 (0.08) | 16.25 (0.03) | 16.87 (0.11) |
N | 4047 | 313 | 3888 | 598 |
Go to school (%) | 43% (2%) | 27% (5%) | 47% (2%) | 3% (1%) |
N | 3868 | 303 | 3732 | 567 |
Work (%) | 55% (2%) | 68% (5%) | 34% (2%) | 17% (2%) |
N | 3960 | 312 | 3830 | 596 |
Work and study (%) | 12% (1%) | 11% (3%) | 10% (1%) | 6% (3%) |
N | 3429 | 256 | 2783 | 130 |
Smokes (%) | 12% (1%) | 35% (4%) | 3% (1%) | 6% (2%) |
N | 2298 | 289 | 2785 | 576 |
Drinks alcohol (%) | 19% (2%) | 42% (4%) | 9% (1%) | 12% (2%) |
N | 2301 | 289 | 2789 | 578 |
Have tried marihuana (%) | 2% (1%) | 9% (4%) | 0% (0%) | 0% (0%) |
N | 2299 | 290 | 2787 | 579 |
Have participated in violent activities (%) | 5% (1%) | 7% (2%) | 4% (1%) | 3% (1%) |
N | 2292 | 289 | 2781 | 578 |
Receive support (%) | 73% (2%) | 72% (5%) | 80% (1%) | 72% (73%) |
N | 2295 | 290 | 2784 | 579 |
Have had sex (%) | 8% (1%) | 15% (1%) | ||
N | 4360 | 4486 | ||
19 to 21 years old | ||||
Boys | Girls | |||
Not active | Active | Not active | Active | |
Age (years) | 19.94 (0.04) | 20.03 (0.09) | 19.93 (0.03) | 19.99 (0.05) |
N | 1719 | 381 | 1611 | 887 |
Go to school (%) | 13% (1%) | 9% (2%) | 16% (2%) | 4% (1%) |
N | 1578 | 368 | 1508 | 834 |
Work (%) | 80% (2%) | 80% (4%) | 46% (3%) | 20% (2%) |
N | 1666 | 380 | 1577 | 886 |
Work and study (%) | 4% (1%) | 5% (2%) | 10% (2%) | 6% (3%) |
N | 1447 | 332 | 910 | 191 |
Smokes (%) | 20% (20%) | 35% (4%) | 2% (1%) | 3% (1%) |
N | 677 | 365 | 1056 | 860 |
Drinks alcohol (%) | 34% (3%) | 46% (5%) | 11% (2%) | 12% (2%) |
N | 681 | 366 | 1060 | 860 |
Have tried marihuana (%) | 5% (2%) | 3% (1%) | 0% (0%) | 0% (0%) |
N | 680 | 366 | 1059 | 860 |
Have participated in violent activities (%) | 6% (2%) | 8% (2%) | 3% (1%) | 5% (1%) |
N | 680 | 365 | 1062 | 865 |
Receive support (%) | 75% (3%) | 84% (3%) | 82% (2%) | 76% (2%) |
N | 678 | 366 | 1062 | 862 |
Have had sex (%) | 18% (1%) | 40% (2%) | ||
N | 2100 | 2498 | ||