Table 1 Descriptive baseline characteristics of the study population
Total cohort | ||||
|---|---|---|---|---|
Self-harm | Non-self-harm | |||
N (%) | Mean (SD) | N (%) | Mean (SD) | |
Gender | ||||
Male | 26 (29.2) | 4488 (50.6) | ||
Female | 63 (70.8) | 4388 (49.4) | ||
Parental socioeconomic status | ||||
Primary education | 9 (10.1) | 661 (7.5) | ||
Secondary education | 14 (15.7) | 2198 (24.8) | ||
Tertiary education | 66 (74.2) | 5997 (67.5) | ||
Missing | 0 (0) | 20 (0.2) | ||
Age (in years) | 15.9 (1.9) | 16.0 (1.8) | ||
Anxiety and depression (SCL-5) | ||||
SCL-5 score | 1.9 (0.8) | 1.5 (0.5) | ||
Missing | 3 (3.4) | 174 (2.0) | ||
Non-caseness symptom level | 58 (65.2) | 7845 (88.3) | ||
Caseness symptom level | 28 (31.4) | 857 (9.7) | ||
Missing | 3 (3.4) | 174 (2.0) | ||
(SCL-5 single items) | ||||
Not felt constantly afraid and anxious | 73 (82.0) | 8469 (95.4) | ||
Felt constantly afraid and anxious | 13 (14.6) | 233 (2.6) | ||
Missing | 3 (3.4) | 174 (2.0) | ||
Not felt tense or uneasy | 64 (71.9) | 8223 (92.7) | ||
Felt tense or uneasy | 21 (23.6) | 445 (5.0) | ||
Missing | 4 (4.5) | 208 (2.4) | ||
Not felt hopelessness thinking of the future | 65 (73.0) | 7818 (88.1) | ||
Felt hopelessness thinking of the future | 21 (23.6) | 877 (9.9) | ||
Missing | 3 (3.4) | 181 (2.0) | ||
Not felt dejected or sad | 67 (75.3) | 7954 (89.6) | ||
Felt dejected or sad | 19 (21.3) | 691 (7.8) | ||
Missing | 3 (3.4) | 231 (2.6) | ||
Not worried too much about things | 62 (69.6) | 7703 (86.8) | ||
Worried too much about things | 24 (27.0) | 981 (11.0) | ||
Missing | 3 (3.4) | 192 (2.2) | ||
Loneliness | ||||
No | 68 (76.4) | 8227 (92.7) | ||
Yes | 18 (20.2) | 509 (5.7) | ||
Missing | 3 (3.4) | 140 (1.6) | ||
Bullied at school | ||||
No | 76 (85.4) | 8475 (95.5) | ||
Yes | 6 (6.7) | 173 (2.0) | ||
Missing | 7 (7.9) | 228 (2.5) | ||
Body mass index (kg/m2)a | ||||
Underweight (BMI <18.5) | 6 (6.7) | 401 (4.5) | ||
Normal-weight (BMI 18.5–25) | 59 (66.3) | 6485 (73.1) | ||
Overweight (BMI 25–30) | 11 (12.4) | 1191 (13.4) | ||
Obesity (BMI >30) | 7 (7.9) | 246 (2.8) | ||
Missing | 6 (6.7) | 553 (6.2) | ||
Epilepsy | ||||
No | 79 (88.7) | 8467 (95.4) | ||
Yes | 3 (3.4) | 95 (1.1) | ||
Missing | 7 (7.9) | 314 (3.5) | ||
Migraine | ||||
No | 76 (85.4) | 8313 (93.7) | ||
Yes | 7 (7.9) | 302 (3.4) | ||
Missing | 6 (6.7) | 261 (2.9) | ||
Asthma | ||||
No | 77 (86.5) | 7691 (86.7) | ||
Yes | 12 (13.5) | 1044 (11.8) | ||
Missing | 0 (0) | 141 (1.6) | ||
Allergy | ||||
No | 65 (73.0) | 5863 (66.1) | ||
Yes | 23 (25.9) | 2882 (32.5) | ||
Missing | 1 (1.1) | 131 (1.5) | ||
Skin rash | ||||
No | 67 (75.3) | 6913 (77.9) | ||
Yes | 21 (23.6) | 1785 (20.1) | ||
Missing | 1 (1.1) | 178 (2.0) | ||
Stomach pain | ||||
No | 52 (58.4) | 6818 (76.8) | ||
Yes | 33 (37.1) | 1743 (19.6) | ||
Missing | 4 (4.5) | 315 (3.6) | ||
Headache | ||||
No | 31 (34.8) | 5186 (58.4) | ||
Yes | 55 (61.8) | 3474 (39.2) | ||
Missing | 3 (3.4) | 216 (2.4) | ||
Smoking | ||||
Non-smoker | 31 (34.8) | 3086 (34.8) | ||
Smoker (occasionally/daily) | 36 (40.5) | 1859 (20.9) | ||
Missing | 22 (24.7) | 3931 (44.3) | ||
Alcohol | ||||
Been drunk ≤10 times | 45 (50.6) | 4669 (52.6) | ||
Been drunk >10 times | 30 (33.7) | 2564 (28.9) | ||
Missing | 14 (15.7) | 1643 (18.5) | ||
Total | 89 | 8876 | ||