Table 3.
Incidence rate ratios (IRRs) and cumulative incidence values (%) for self-harm and violent offending at ages 15–35 by reason for trauma-related hospital admission before the 15th birthday
| People with adverse outcome (n) | Incidence rate per 10 000 person-years | IRR*(95% CI) | Cumulative incidence†(95% CI) | ||
|---|---|---|---|---|---|
| Men | |||||
| Self-harm‡ | |||||
| Self-harm§ | 110 | 50·8 | 2·24 (1·84–2·69) | 7·5% (5·7–9·7) | |
| Interpersonal violence | 54 | 65·6 | 3·14 (2·37–4·05) | 9·4% (7·1–12·0) | |
| Accident | 1688 | 30·1 | 1·54 (1·46–1·62) | 5·0% (4·6–5·3) | |
| No trauma-related hospital admission (ref) | 8871 | 18·5 | 1·00 | 3·2% (3·1–3·2) | |
| Violent crime conviction | |||||
| Self-harm | 230 | 110·3 | 1·92 (1·69–2·19) | 13·7% (11·7–15·8) | |
| Interpersonal violence | 149 | 196·5 | 3·82 (3·24–4·47) | 25·0% (21·2–28·9) | |
| Accident | 4012 | 73·8 | 1·50 (1·45–1·56) | 10·4% (10·0–10·8) | |
| No trauma-related hospital admission (ref) | 21 662 | 46·0 | 1·00 | 6·8% (6·7–6·9) | |
| Women | |||||
| Self-harm‡ | |||||
| Self-harm§ | 657 | 248·0 | 6·60 (6·10–7·14) | 21·4% (19·8–23·1) | |
| Interpersonal violence | 54 | 152·2 | 4·16 (3·14–5·37) | 18·3% (13·5–23·6) | |
| Accident | 1789 | 47·9 | 1·47 (1·40–1·55) | 6·5% (6·1–7·0) | |
| No trauma-related hospitalisation (ref) | 13 028 | 28·4 | 1·00 | 4·0% (4·0–4·1) | |
| Violent crime conviction | |||||
| Self-harm | 163 | 55·4 | 6·41 (5·45–7·48) | 6·4% (5·2–7·8) | |
| Interpersonal violence | 29 | 77·8 | 9·85 (6·67–13·92) | 8·4% (5·7–11·6) | |
| Accident | 430 | 11·2 | 1·58 (1·42–1·74) | 1·5% (1·3–1·6) | |
| No trauma-related hospital admission (ref) | 2815 | 6·0 | 1·00 | 0·9% (0·9–0·9) | |
*
Adjusted for age band and calendar year period.
†
Measures the probability or risk of experiencing the outcome of interest by the 35th birthday.
‡
Self harm as an outcome (15–35 years).
§
Self harm as a reason for hospital admission (before age 15 years).