Table 1.
Individual’s characteristics at the time of inclusion in 2013–2014 in adolescents and young adults hospitalised for a mental disorder, compared with the non-affected control group without a mental disorder and matched for age and sex, and with the affected control group with a mental disorder but not hospitalised in psychiatry
| At index hospitalisation | Hospitalised patients (n=73 300) | Non-affected controls (n=219 900) | P value | Affected controls (n=9 683) | P value | |||
| n | % | n | % | n | % | |||
| Age group | 1 | <0.0001 | ||||||
| 12–15 years | 16 113 | 22.0 | 48 339 | 22.0 | 1 987 | 20.5 | ||
| 16–18 years | 18 172 | 24.8 | 54 516 | 24.8 | 1 963 | 20.3 | ||
| 19–21 years | 18 818 | 25.7 | 56 454 | 25.7 | 3 419 | 35.3 | ||
| 22–24 years | 20 197 | 27.6 | 60 691 | 27.6 | 2 314 | 23.9 | ||
| Sex | 1 | 0.0002 | ||||||
| Male | 39 271 | 53.6 | 117 813 | 53.6 | 4 996 | 51.6 | ||
| Female | 34 029 | 46.4 | 102 087 | 46.4 | 4 687 | 48.4 | ||
| Background period (2008 to inclusion) | ||||||||
| Hospitalisation with a somatic disorder diag. | 28 429 | 38.8 | 15 224 | 6.9 | <0.0001 | 3 712 | 38.3 | 0.4 |
| Hospitalisation with a mental disorder diag. | 72 017 | 98.3 | 0 | 0 | – | 5 841 | 60.3 | <0.0001 |
| Hospitalisation for self-harm | 9 164 | 12.5 | 134 | 0.06 | <0.0001 | 982 | 10.1 | <0.0001 |
| Outpatient psychotropic medication prescription | 48 943 | 66.8 | 0 | 0 | – | 6 312 | 65.2 | 0.002 |
| Main mental disorder diagnosis at index hospitalisation | ||||||||
| Mental and behavioural disorders due to psychoactive substance use | 4 454 | 6.1 | – | – | – | – | – | – |
| Schizophrenia | 13 284 | 18.1 | – | – | – | – | – | – |
| Mood disorders | 14 025 | 19.1 | – | – | – | – | – | – |
| Neurotic, stress-related disorders | 14 408 | 19.7 | – | – | – | – | – | – |
| Behavioural syndromes associated with physiological disturbances and physical factors | 3 250 | 4.4 | – | – | – | – | – | – |
| Disorders of adult personality | 7 559 | 10.3 | – | – | – | – | – | – |
| Mental retardation | 1 749 | 2.4 | – | – | – | – | – | – |
| Disorders of psychological development | 4 971 | 6.8 | – | – | – | – | – | – |
| Behavioural and emotional disorders occurring in childhood and adolescence | 8 089 | 11.0 | – | – | – | – | – | – |
| Unspecified mental disorder | 1 511 | 2.1 | – | – | – | – | – | – |
| Self-harm at index hospitalisation | 2 842 | 3.9 | – | – | – | – | – | – |