Comparison of cases and controls on Bike Ed exposure, with OR unadjusted and adjusted for potential confounding factors
| Crude OR | 95% CI | Adjusted* OR | 95% CI | |
|---|---|---|---|---|
| *Adjusted using multiple logistic regression for age, sex, and income category. | ||||
| †Exposure defined as having participated in a Bike Ed program at school according to parent report. | ||||
| ‡Analysis restricted to cases (n=106) and controls (n=97) where the parent report of participation in a Bike Ed program was validated by independent information confirming the existence of such a program at the school. | ||||
| §Minor injury defined as an injury at the lowest severity level to one body part only, that is injury severity score = 1 (n=54 cases). | ||||
| Bike Ed (any)† | 1.64 | (0.98 to 2.75) | 1.57 | (0.91 to 2.71) |
| Bike Ed by level | ||||
| In school only | 1.46 | (0.78 to 2.73) | 1.37 | (0.71 to 2.64) |
| On-road | 1.96 | (0.92 to 4.16) | 1.94 | (0.88 to 4.29) |
| Bike Ed (validated)‡ | 1.65 | (0.89 to 3.07) | 1.63 | (0.84 to 3.16) |
| Bike Ed (any, omitting cases with minor injuries§) | 1.38 | (0.77 to 2.48) | 1.32 | (0.71 to 2.44) |