Self reported helmet fit and risk of head injury in bicycle crashes (percentages)
| All (n=1718) | Head injured (n=222) | Non-head injured (n=1496) | Odds ratio* (95% CI) | |
|---|---|---|---|---|
| *Adjusting for crash severity did not produce a significant change in the odds ratio; therefore, crude odds ratios are presented. CI = confidence interval. | ||||
| Fit | ||||
| Excellent | 65 | 59 | 66 | 1.00 |
| Good | 28 | 31 | 27 | 1.26 (0.91 to 1.75) |
| Fair | 2 | 3 | 2 | 1.68 (0.61 to 3.98) |
| Poor | 4 | 7 | 4 | 1.96 (1.10 to 3.75) |
| Position | ||||
| Center | 84 | 79 | 85 | 1.00 |
| Posterior | 13 | 18 | 13 | 1.52 (1.02 to 2.26) |
| Side | 1 | 2 | 1 | 1.13 (0.26 to 3.72) |
| Helmet came off during crash | 4 | 9 | 3 | 3.25 (1.82 to 5.75) |