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Table 1 Descriptive baseline characteristics of the study population

From: Adolescent health and subsequent risk of self-harm hospitalisation: a 15-year follow-up of the Young-HUNT cohort

  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  
  1. Results are reported as numbers and percentages [N (%)] except for the continuous variables where mean and standard deviation [Mean (SD)] is reported
  2. SCL-5 Hopkins Symptom Checklist, 5-item version
  3. aAge-and-gender specific body mass index categories based on international cut-off values