Multivariate analysis—significant variables predictive of lower helmet use by age categories
| Age group (years) | Significant variables | Adjusted odds ratios (95% CI) | Non-significant variables* |
|---|---|---|---|
| *Variables listed in order of being dropped from the stepwise logistic regression analysis. | |||
| <8 | Lower income | 5.0 (2.2 to 11.5) | Riding near a school |
| Riding rurally | 2.3 (1.3 to 4.3) | Riding in a park | |
| Sex (male) | 1.9 (1.2 to 3.0) | Riding near major intersection | |
| Riding with other children | |||
| Riding with adult(s) | |||
| 8–11 | Riding rurally | 5.4 (1.8 to 16.1) | Riding near major intersection |
| Lower income | 5.4 (1.1 to 26.3) | Riding with other children | |
| Riding in a park | 0.39 (0.17 to 0.90) | Riding near a school | |
| Riding with adult(s) | 0.14 (0.05 to 0.38) | Sex | |
| 12–15 | Riding with adult(s) | 0.25 (0.08 to 0.81) | Income |
| Riding near a school | |||
| Sex | |||
| Riding with other children | |||
| Riding near major intersection | |||
| Riding in a park | |||
| Riding rurally | |||
| 16–19 | Riding rurally/lower income | 6.5 (1.7 to 24.4) | Riding in a park |
| Riding with adult(s) | 0.20 (0.05 to 0.92) | Riding with other children | |
| Riding near major intersection | |||
| Riding near a school | |||
| Sex | |||
| >19 | Riding rurally | 12.1 (4.3 to 34.5) | Riding on cycling path |
| Income $9719–$18 334 | 6.1 (3.1 to 11.8) | Riding with other adults | |
| Income $18 335–32 957 | 2.9 (2.1 to 4.1) | Riding in a park | |
| Income $32 958–47 581 | 2.0 (1.5 to 2.9) | Riding with children | |
| Sex (male) | 1.4 (1.1 to 1.9) | Riding near a school | |
| Riding near a major intersection | 0.61 (0.46 to 0.80) | ||