Twenty six country model of bicycle helmet use
| Measure | Odds ratio | 95% CI | t Ratio | p Value |
|---|---|---|---|---|
| *The reference group was age 11. | ||||
| Individual level predictors | ||||
| Age 13* | 0.36 | 0.34–0.37 | −45.57 | 0.000 |
| Age 15* | 0.20 | 0.19–0.21 | −55.79 | 0.000 |
| Female | 0.81 | 0.78–0.84 | −10.65 | 0.000 |
| Parental involvement | 1.09 | 1.06–1.11 | 7.03 | 0.000 |
| Risk taking | 0.72 | 0.70–0.74 | −22.09 | 0.000 |
| Healthy behavior | 1.99 | 1.94–2.05 | 50.55 | 0.000 |
| Country level predictors | ||||
| Per capita GDP | 1.88 | 1.34–2.62 | 3.86 | 0.001 |