Table 4 Rates and relative risks of death according to the crash report, medical resource utilization, and medical outcomes with 95 % confidence intervals
From: Motorcycle helmet effectiveness in reducing head, face and brain injuries by state and helmet law
Motorcycle helmet law | Death according to crash reportc | Link to medical recordc | Head injurya | Facial injurya | Traumatic brain injurya | Moderate to severe head or facial injury or deathb |
|---|---|---|---|---|---|---|
Partial Helmet Law | 3.5 % (3.3,3.7) | 55 % (54,55) | 30 % (29,31) | 23 % (22,23) | 14 % (14,15) | 18 % (18,19) |
Universal Helmet Law | 3.4 % (3.2,3.6) | 58 % (58,59) | 21 % (20,21) | 13 % (13,14) | 12 % (12,13) | 16 % (15,16) |
Relative Riskd | ||||||
Partial vs. Universal Law | 1.0 (0.8, 1.2) | 1.0 (0.9, 1.2) | 1.4 (1.2, 1.6) | 1.5 (1.3, 1.8) | 1.1 (0.9, 1.4) | 1.1 (0.9, 1.3) |