Table 1.
Sociodemographic characteristics and mental health of the study population
| Variables | Total | Boys | Girls |
|---|---|---|---|
| Total | 54,948 (100.0) | 28,353 (51.6) | 26,595 (48.4) |
| Age (yr) | 15.10±1.75 | 15.12±1.76 | 15.07±1.75 |
| Area of residence | |||
| Metropolitan area | 23,621 (43.0) | 12,553 (44.3) | 11,068 (41.6) |
| Urban area | 26,981 (49.1) | 13,562 (47.8) | 13,419 (50.5) |
| Rural area | 4,346 (7.9) | 2,238 (7.9) | 2,108 (7.9) |
| School grade | |||
| 7th | 10,005 (18.2) | 5,098 (18.0) | 4,907 (18.5) |
| 8th | 9,564 (17.4) | 4,823 (17.0) | 4,741 (17.8) |
| 9th | 9,392 (17.1) | 4,909 (17.3) | 4,483 (16.9) |
| 10th | 8,907 (16.2) | 4,602 (16.2) | 4,305 (16.2) |
| 11th | 8,907 (16.2) | 4,631 (16.3) | 4,276 (16.1) |
| 12th | 8,173 (14.9) | 4,290 (15.1) | 3,883 (14.6) |
| Household income level | |||
| High | 6,039 (11.0) | 3,536 (12.5) | 2,503 (9.4) |
| Middle | 47,634 (86.7) | 24,095 (85.0) | 23,539 (88.5) |
| Low | 1,275 (2.3) | 722 (2.5) | 553 (2.1) |
| Academic achievement | |||
| High | 6,736 (12.3) | 3,853 (13.6) | 2,883 (10.8) |
| Middle | 42,679 (77.7) | 21,400 (75.5) | 21,279 (80.0) |
| Low | 5,533 (10.1) | 3,100 (10.9) | 2,433 (9.1) |
| Body mass index* | |||
| Low weight | 11,226 (20.4) | 4,636 (16.8) | 6,590 (25.6) |
| Normal weight | 25,777 (46.9) | 11,997 (43.5) | 13,780 (53.5) |
| Overweight | 7,264 (13.2) | 4,436 (16.1) | 2,828 (11.0) |
| Obese | 9,093 (16.5) | 6,538 (23.7) | 2,555 (9.9) |
| Cigarette use | |||
| Never | 49,318 (89.8) | 24,448 (86.2) | 24,870 (93.5) |
| Ever | 5,630 (10.2) | 3,905 (13.8) | 1,725 (6.5) |
| Alcohol use | |||
| Never | 36,591 (66.6) | 17,778 (62.7) | 18,813 (70.7) |
| Ever | 18,357 (33.4) | 10,575 (37.3) | 7,782 (29.3) |
| Smartphone overdependence | |||
| General-use group | 41,173 (74.9) | 22,521 (79.4) | 18,652 (70.1) |
| Potential-risk group | 12,142 (22.1) | 5,239 (18.5) | 6,903 (26.0) |
| High-risk group | 1,633 (3.0) | 593 (2.1) | 1,040 (3.9) |
| Generalized anxiety disorder | |||
| No | 36,711 (66.8) | 20,880 (73.6) | 15,831 (59.5) |
| Yes | 18,237 (33.2) | 7,473 (26.4) | 10,764 (40.5) |
| Suicidal ideation | |||
| No | 48,969 (89.1) | 26,099 (92.1) | 22,870 (86.0) |
| Yes | 5,979 (10.9) | 2,254 (7.9) | 3,725 (14.0) |
Values are presented as mean±standard deviation or number (%).
*
there is some missing data as not all individuals responded