From: Motorcycle helmet effectiveness in reducing head, face and brain injuries by state and helmet law
Motorcycle helmet law and type of crash | Head injurya | Facial injurya | Traumatic brain injurya | Moderate to severe head or facial injury or deathb |
---|---|---|---|---|
Partial Law, Single-Vehicle | 2.1 (1.9,2.2) | 2.7 (2.2,3.4) | 1.8 (1.6,2.0) | 1.9 (1.6,2.1) |
Universal Law, Single-Vehicle | 1.4 (1.2,1.6) | 1.5 (1.2,1.7) | 1.4 (1.2,1.6) | 1.4 (1.2,1.6) |
Partial Law, Multi-Vehicle | 1.8 (1.6,2.0) | 2.3 (1.8,2.9) | 1.5 (1.3,1.8) | 1.5 (1.3,1.7) |
Universal Law, Multi-Vehicle | 1.2 (1.1,1.4) | 1.2 (1.0,1.4) | 1.2 (1.0,1.4) | 1.1 (1.0,1.2) |