Table 1 Characteristics of the study population overall and stratified by gender
Girls N = 4527 | Boys N = 3654 | Total N = 8181 | |
|---|---|---|---|
Mean level of perceived stress (SD) | 16.3 (6.6) | 12.6 (5.9) | 14.7 (6.5) |
Subjective social status in society (%) | |||
Low | 117 (2.6) | 79 (2.2) | 196 (2.4) |
Medium | 2767 (61.1) | 2049 (56.1) | 4816 (58.9) |
High | 1643 (36.3) | 1526 (41.7) | 3169 (38.7) |
Subjective social status in school (%) | |||
Low | 252 (5.6) | 140 (3.8) | 392 (4.8) |
Medium | 2519 (55.6) | 1563 (42.8) | 4082 (49.9) |
High | 1756 (38.8) | 1951 (53.4) | 3707 (45.3) |
Neighbourhood safety (%) | |||
Low | 114 (2.5) | 60 (1.6) | 174 (2.1) |
High | 4413 (97.5) | 3594 (98.4) | 8007 (97.9) |
Home characteristics (%) | |||
1 home | 3350 (74.0) | 2676 (73.2) | 6026 (73.7) |
2 homes | 1177 (26.0) | 978 (26.8) | 2155 (26.3) |
Grade meaning (%) | |||
Very important | 1686 (37.2) | 811 (22.2) | 2497 (30.5) |
Important | 2321 (51.3) | 1915 (52.4) | 4236 (51.8) |
Not or less important | 520 (11.5) | 928 (25.4) | 1448 (17.7) |
Homework load (%) | |||
≤ 3 h a week | 4199 (92.7) | 3508 (96.0) | 7707 (94.2) |
> 3 h a week | 328 (7.3) | 146 (4.0) | 474 (5.8) |
Self-rated health (%) | |||
Fair/poor | 281 (6.2) | 165 (4.5) | 446 (5.5) |
Good/very good/excellent | 4244 (93.8) | 3486 (95.5) | 7730 (94.5) |
Smoking (%) | |||
Non-smoker | 3720 (82.2) | 3061 (83.8) | 6781 (82.9) |
Smoker | 807 (17.8) | 593 (16.2) | 1400 (17.1) |
Alcohol (%) | |||
≤ 2 days a month | 4161 (91.9) | 3207 (87.8) | 7.368 (90.1) |
≥ 3 days a month | 366 (8.1) | 447 (12.2) | 813 (9.9) |