Table 3.
aORs of self-harm in the week following exposure to any of the triggers (eg, fall-related injury, transport-related injury, traumatic brain injury and injury from interpersonal assault) compared with earlier unexposed periods within the same person, stratified by psychiatric diagnostic categories (eg, schizophrenia-spectrum disorder, bipolar disorder, depression and those without psychiatric disorders) and sex
| All individuals (reference) | Men | Women | |
| aOR (95% CI) | aOR (95% CI) | aOR (95% CI) | |
| Schizophrenia-spectrum disorders | |||
| Fall-related injury | 2.1 (1.8 to 2.4) | 2.4 (2.0 to 2.8) | 1.9 (1.6 to 2.3) |
| Transport-related injury | 2.7 (2.1 to 3.5) | 3.3 (2.4 to 4.7) | 2.1 (1.4 to 3.2) |
| Traumatic brain injury | 2.4 (2.0 to 2.9) | 2.7 (2.2 to 3.4) | 2.1 (1.6 to 2.7) |
| Injury from interpersonal assault | 2.0 (1.6 to 2.5) | 2.9 (2.2 to 3.9) | 1.3 (0.8 to 2.0) |
| Bipolar disorder | |||
| Fall-related injury | 2.0 (1.6 to 2.4) | 2.7 (2.0 to 3.6) | 1.7 (1.3 to 2.2) |
| Transport-related injury | 2.9 (2.1 to 4.1) | 3.5 (2.1 to 5.7) | 2.7 (1.7 to 4.4) |
| Traumatic brain injury | 2.9 (2.3 to 3.7) | 2.7 (1.9 to 3.8) | 3.1 (2.2 to 4.3) |
| Injury from interpersonal assault | 2.7 (1.9 to 3.8) | 3.4 (2.1 to 5.6) | 2.4 (1.5 to 3.9) |
| Depression | |||
| Fall-related injury | 2.4 (2.1 to 2.6) | 2.9 (2.5 to 3.4) | 2.0 (1.8 to 2.4) |
| Transport-related injury | 2.4 (1.9 to 2.9) | 2.4 (1.8 to 3.2) | 2.3 (1.8 to 3.1) |
| Traumatic brain injury | 2.6 (2.3 to 3.0) | 3.1 (2.7 to 3.7) | 1.9 (1.5 to 2.4) |
| Injury from interpersonal assault | 2.7 (2.3 to 3.3) | 3.2 (2.5 to 4.1) | 2.3 (1.8 to 3.0) |
| No psychiatric disorders | |||
| Fall-related injury | 6.9 (6.2 to 7.6) | 6.5 (5.8 to 7.3) | 7.7 (6.5 to 9.2) |
| Transport-related injury | 6.3 (5.4 to 7.4) | 6.1 (5.0 to 7.4) | 6.2 (4.6 to 8.4) |
| Traumatic brain injury | 7.3 (6.4 to 8.4) | 7.5 (6.4 to 8.7) | 7.1 (5.3 to 9.4) |
| Injury from interpersonal assault | 7.6 (6.3 to 9.3) | 7.8 (6.3 to 9.7) | 7.1 (4.6 to 11.0) |
Notes: The within-individual comparisons were adjusted for age, calendar month and all time-stable individual-level unmeasured confounders (eg, genetic risks, early childhood environmental factors and early-onset neurodevelopmental disorders). The psychiatric disorders were defined hierarchically.
aOR, adjusted OR.