Table 1 Demographic characteristics of the survey participants (n = 62,276)
Variable | Total (n = 62,276) | Boys (n = 31,624) | Girls (n = 30,652) | |||
|---|---|---|---|---|---|---|
n | (%)a | n | (%)a | n | (%)a | |
Grade | ||||||
 7th grade | 10,189 | (14.8) | 5178 | (14.8) | 5011 | (14.9) |
 8th grade | 10,377 | (15.4) | 5272 | (15.3) | 5105 | (15.4) |
 9th grade | 10,319 | (15.1) | 5202 | (15.1) | 5117 | (15.0) |
 10th grade | 10,165 | (17.1) | 5069 | (17.1) | 5096 | (17.1) |
 11th grade | 10,800 | (19.0) | 5610 | (19.1) | 5190 | (18.9) |
 12th grade | 10,426 | (18.6) | 5293 | (18.6) | 5133 | (18.7) |
Educational stage | ||||||
 Middle school | 30,885 | (45.3) | 15,652 | (45.2) | 15,233 | (45.3) |
 High school | 31,391 | (54.7) | 15,972 | (54.8) | 15,419 | (54.7) |
Region | ||||||
 Metropolitan | 32,065 | (51.4) | 15,848 | (51.3) | 16,217 | (51.5) |
 Medium and small cities | 26,614 | (44.0) | 13,940 | (44.2) | 12,674 | (43.9) |
 Rural | 3597 | (4.6) | 1836 | (4.5) | 1761 | (4.6) |
Family living structure | ||||||
 Living with both parents | 51,735 | (83.9) | 26,176 | (83.5) | 25,559 | (84.2) |
 Living with a single parent | 8729 | (13.5) | 4440 | (13.5) | 4289 | (13.4) |
 Others | 1812 | (2.6) | 1008 | (3.0) | 804 | (2.4) |
Perceived household economic status | ||||||
 Wealthy | 24,802 | (40.4) | 13,618 | (43.4) | 11,184 | (37.1) |
 Medium | 28,582 | (45.6) | 13,664 | (42.9) | 14,918 | (48.4) |
 Poor | 8892 | (14.0) | 4342 | (13.7) | 4550 | (14.5) |
Perceived academic record | ||||||
 High | 24,524 | (39.2) | 12,925 | (40.8) | 11,599 | (37.3) |
 Middle | 17,810 | (28.7) | 8683 | (27.6) | 9127 | (30.0) |
 Low | 19,942 | (32.1) | 10,016 | (31.6) | 9926 | (32.7) |
Perceived stress | ||||||
 High | 23,259 | (37.2) | 9552 | (30.4) | 13,707 | (44.6) |
 Middle | 26,271 | (42.6) | 13,745 | (43.9) | 12,526 | (41.2) |
 Low | 12,746 | (20.2) | 8327 | (25.8) | 4419 | (14.2) |
Depression experience | ||||||
 Yes | 15,612 | (25.1) | 6326 | (20.3) | 9286 | (30.3) |
 No | 46,664 | (74.9) | 25,298 | (79.7) | 21,366 | (69.7) |
Current alcohol use | ||||||
 User | 9597 | (16.1) | 5562 | (18.2) | 4035 | (13.2) |
 Non-user | 52,679 | (83.9) | 26,062 | (81.8) | 26,617 | (86.8) |