Adjusted risk factors for hospitalisation for self-harm, hospitalisation with a somatic disorder diagnosis, death from any cause and from suicide during the 3-year follow-up in adolescents and young adults hospitalised for a mental disorder in 2013–2014, in comparison to the non-affected control group without a mental disorder and matched for age and sex, and to the affected control group with a mental disorder but not hospitalised
| Versus non-affected controls | Versus affected controls | |||
| HR | 95% CI | HR | 95% CI | |
| Hospitalisation for self-harm during follow-up | ||||
| Index hospitalisation for mental disorder (ref=0) | 105.5 | 89.5 to 124.4 | 1.5 | 1.4 to 1.6 |
| Age (ref=12–15 years) | ||||
| 16–18 years | 0.9 | 0.8 to 0.9 | 0.9 | 0.8 to 1.0 |
| 19–21 years | 0.9 | 0.8 to 1.0 | 0.9 | 0.8 to 0.9 |
| 22–24 years | 0.9 | 0.8 to 1.0 | 0.9 | 0.8 to 1.0 |
| Female (ref=male) | 1.5 | 1.4 to 1.6 | 1.8 | 1.7 to 1.9 |
| Past hospitalisation with a somatic disorder diagnosis (ref=0) | 1.5 | 1.4 to 1.6 | 1.4 | 1.3 to 1.5 |
| Past hospitalisation for self-harm (ref=0) | 2.9 | 2.8 to 3.1 | 2.9 | 2.7 to 3.1 |
| Hospitalisation with a somatic disorder diagnosis during follow-up | ||||
| Index hospitalisation for mental disorder (ref=0) | 4.1 | 3.9 to 4.1 | 1.4 | 1.3 to 1.5 |
| Age (ref=12–15 years) | ||||
| 16–18 years | 0.9 | 0.9 to 1.0 | 0.9 | 0.9 to 0.9 |
| 19–21 years | 1.0 | 0.9 to 1.0 | 0.9 | 0.9 to 0.9 |
| 22–24 years | 1.1 | 1.1 to 1.2 | 1.1 | 1.0 to 1.1 |
| Female (ref=male) | 1.3 | 1.3 to 1.4 | 1.5 | 1.4 to 1.5 |
| Past hospitalisation with a somatic disorder diagnosis (ref=0) | 2.1 | 2.0 to 2.2 | 1.8 | 1.8 to 1.9 |
| Past hospitalisation for self-harm (ref=0) | 1.3 | 1.3 to 1.4 | 1.4 | 1.3 to 1.4 |
| Death (all causes) during follow-up | ||||
| Index hospitalisation for mental disorder (ref=0) | 13.3 | 10.6 to 16.7 | 2.2 | 1.5 to 3.0 |
| Age (ref=12–15 years) | ||||
| 16–18 years | 2.6 | 1.8 to 3.8 | 2.8 | 1.9 to 4.1 |
| 19–21 years | 4.3 | 3.0 to 6.0 | 4.6 | 3.2 to 6.7 |
| 22–24 years | 6.5 | 4.6 to 9.0 | 7.0 | 4.8 to 10.0 |
| Female (ref=male) | 0.5 | 0.4 to 0.6 | 0.6 | 0.5 to 0.7 |
| Past hospitalisation with a somatic disorder diagnosis (ref=0) | 1.7 | 1.4 to 2.0 | 1.6 | 1.4 to 1.9 |
| Past hospitalisation for self-harm (ref=0) | 1.7 | 1.3 to 2.1 | 1.7 | 1.3 to 2.1 |
| Suicide during follow-up | ||||
| Index hospitalisation for mental disorder (ref=0) | 9.2 | 4.3 to 19.8 | 1.7 | 1.0 to 2.9 |
| Age (ref=12–15 years) | ||||
| 16–18 years | 0.7 | 0.3 to 1.5 | 2.2 | 1.0 to 4.5 |
| 19–21 years | 1.1 | 0.6 to 2.0 | 5.4 | 2.8 to 10.5 |
| 22–24 years | 0.9 | 0.5 to 1.7 | 6.6 | 3.4 to 12.7 |
| Female (ref=male) | 1.2 | 0.9 to 1.6 | 0.7 | 0.5 to 1.0 |
| Past hospitalisation with a somatic disorder diagnosis (ref=0) | 0.8 | 0.6 to 1.1 | 1.3 | 0.9 to 1.8 |
| Past hospitalisation for self-harm (ref=0) | 1.3 | 0.9 to 1.9 | 2.2 | 1.5 to 3.2 |