ICD-10 body region* | Rider (n = 252) | Pillion (n = 126) | Relative risk (RR) of injury (referent: pillions) | |
---|---|---|---|---|
 | N (%) injured | N (%) injured | RR | 95% CI†|
Head and Neck | Â | Â | Â | Â |
   Superficial | 93 (36.9%) | 35 (27.8%) | 1.33 | 0.96–1.84 |
   Open wound | 95 (37.7%) | 39 (31.0%) | 1.22 | 0.89–1.65 |
   Fracture | 26 (10.3%) | 13 (10.3%) | 1.0 | 0.53–1.87 |
   Intracranial | 29 (11.5%) | 14 (11.1%) | 1.03 | 0.57–1.89 |
   Crush | 5 (2.0%) | 2 (1.6%) | 1.25 | 0.24–6.35 |
   Traumatic amputation | 1 (0.4%) | 1 (0.8%) | 0.50 | 0.03–7.92 |
   Other unspecified | 23 (9.1%) | 13 (10.3%) | 0.88 | 0.46–1.68 |
   Neck, injury nerves | 1 (0.4%) | 0 (0.0%) | - | - |
Thorax and Abdomen | Â | Â | Â | Â |
   Superficial | 19 (7.5%) | 6 (4.8%) | 1.58 | 0.65–3.86 |
   Open wound | 3 (1.2%) | 2 (1.6%) | 0.75 | 0.13–4.43 |
   Fracture | 13 (5.2%) | 3 (2.4%) | 2.17 | 0.63–7.46 |
   Intra-thoracic organ, unspecified | 1 (0.4%) | 0 (0.0%) | - | - |
   Intra-abdominal organs, injury | 2 (0.8%) | 2 (1.6%) | 0.50 | 0.07–3.50 |
   Lumbar spine/pelvis: dislocation, sprain | 1 (0.4%) | 0 (0.0%) | - | - |
   Other unspecified | 11 (4.4%) | 6 (4.8%) | 0.92 | 0.35–2.42 |
Upper Extremity | Â | Â | Â | Â |
   Superficial | 72 (28.6%) | 29 (23.0%) | 1.24 | 0.85–1.80 |
   Open wound | 18 (7.1%) | 4 (3.2%) | 2.25 | 0.78–6.51 |
   Fracture | 25 (9.9%) | 12 (9.5%) | 1.04 | 0.54–2.00 |
   Dislocation, sprain, joints & ligaments | 1 (0.4%) | 0 (0.0%) | - | - |
   Crush | 0 (0.0%) | 2 (1.6%) | - | - |
   Other unspecified | 13 (5.2%) | 4 (3.2%) | 1.65 | 0.54–4.88 |
Lower Extremity | Â | Â | Â | Â |
   Superficial | 56 (22.2%) | 34 (27.0%) | 0.82 | 0.57–1.19 |
   Open wound | 24 (9.5%) | 20 (15.9%) | 0.60 | 0.35–1.04 |
   Fracture | 46 (18.3%) | 26 (20.6%) | 0.88 | 0.57–1.36 |
   Dislocation, sprain, joints & ligaments | 1 (0.4%) | 0 (0.0%) | - | - |
   Crush | 4 (1.6%) | 8 (6.3%) | 0.25 | 0.08–0.81 |
   Other unspecified | 5 (2.0%) | 7 (5.6%) | 0.35 | 0.11–1.10 |