Wearing helmet | Not wearing helmet | Information unknown | Assuming all unknown=not wearing a helmet (Column E = Columns C+D) | |
Number | 4075 | 2546 | 4571 | 7117 |
Age (IQR) | 49.7 (39.7–58.5) | 45.3 (30.4–57.1) | 47.6 (36.3–58.8) | 47.6 (34–58.2) |
% Male (n, 95% CI) | 84.7% (3451, 83.5% to 85.8%) | 82.8% (2108, 81.3% to 84.2%) | 82.3% (3764, 81.2% to 83.4%) | 82.5% (5872, 81.6% to 83.4%) |
Crude 30-day Mortality (n, 95% CI) | 1.8% (72, 1.4% to 2.2%) | 5.6% (143, 4.8% to 6.6%) | 2.2% (102, 1.8% to 2.7%) | 3.4% (245, 3% to 3.9%) |
Mortality rate, adjusted W score | 2.4 (1.3–3.6) | 1.1 (−0.1 to 2.2) | ||
Alcohol intake (n, 95% CI) | 2.1% (85, 1.7% to 2.6%) | 15.6% (397, 14.3% to 17.1%) | 7.5% (4571, 6.8% to 8.3%) | 10.4% (739, 9.7% to 11.1%) |
IQR, inter-quartile range.