ICD-10 Head Injury* | Helmet worn (n = 74) | Helmet not worn (n = 304) | Not worn relative risk (RR) of injury to worn | |
---|---|---|---|---|
 | N (%) | N (%) | RR | 95% confidence interval |
Superficial | 22 (29.7%) | 106 (34.9%) | 1.17 | 0.80–1.72 |
Open wound | 16 (20.3%) | 118 (38.8%) | 1.91 | 1.19–3.07 |
Fracture | 6 (6.8%) | 33 (10.5%) | 1.56 | 0.63–3.86 |
Intracranial | 2 (2.7%) | 41 (13.5%) | 4.99 | 1.23–20.1 |
Crush | 1 (1.4%) | 6 (2.0%) | 1.46 | 0.17–11.9 |
Traumatic amputation | 0 (0%) | 2 (0.7%) | - | - |
Other unspecified | 5 (6.8%) | 31 (10.2%) | 1.51 | 0.61–3.74 |