Crude and adjusted HRs in the baseline and follow-up cohorts
| Crude HR (95% CI) | Crude RHR (95% CI)* | Adjusted HR (95% CI) | Adjusted RHR (95% CI)* | |||
|---|---|---|---|---|---|---|
| Baseline cohort | Follow-up cohort | Baseline cohort | Follow-up cohort | |||
| All crashes | ||||||
| Crash history at baseline | ||||||
| Yes | 1.43 (1.28 to 1.60) | 1.46 (1.27 to 1.67) | 1.02 (0.93 to 1.12) | 1.27 (1.13 to 1.42) | 1.31 (1.14 to 1.51) | 1.05 (0.95 to 1.16) |
| No | 1.00 | 1.00 | 1.00 | 1.00 | ||
| Ever ride in a bunch | ||||||
| Yes | 1.89 (1.64 to 2.18) | 1.68 (1.41 to 2.00) | 0.88 (0.78 to 0.98) | 1.48 (1.27 to 1.72) | 1.41 (1.17 to 1.70) | 0.95 (0.84 to 1.08) |
| No | 1.00 | 1.00 | 1.00 | 1.00 | ||
| Ever listen to music while riding | ||||||
| Yes | 1.11 (1.00 to 1.28) | 1.28 (1.07 to 1.52) | 1.14 (1.00 to 1.29) | 1.13 (0.98 to 1.31) | 1.25 (1.04 to 1.50) | 1.09 (0.96 to 1.25) |
| No | 1.00 | 1.00 | 1.00 | 1.00 | ||
| Always use lights in the dark | ||||||
| Yes | 0.91 (0.77 to 1.06) | 0.82 (0.67 to 1.00) | 0.90 (0.77 to 1.05) | 0.81 (0.69 to 0.96) | 0.74 (0.61 to 0.92) | 0.91 (0.78 to 1.07) |
| No | 1.00 | 1.00 | 1.00 | 1.00 | ||
| On-road crashes | ||||||
| Cycle to work at least once a week | ||||||
| Yes | 1.19 (1.02 to 1.38) | 1.24 (1.03 to 1.49) | 1.04 (0.94 to 1.16) | 1.05 (0.89 to 1.24) | 1.13 (0.92 to 1.38) | 1.07 (0.95 to 1.21) |
| No | 1.00 | 1.00 | 1.00 | 1.00 | ||
| Wear fluorescent colours | ||||||
| Always | 0.89 (0.72 to 1.10) | 0.87 (0.67 to 1.14) | 0.98 (0.83 to 1.16) | 0.93 (0.74 to 1.16) | 0.96 (0.72 to 1.28) | 1.05 (0.87 to 1.26) |
| Sometimes | 1.04 (0.86 to 1.25) | 1.05 (0.83 to 1.33) | 1.02 (0.89 to 1.18) | 1.00 (0.82 to 1.22) | 1.06 (0.83 to 1.36) | 1.09 (0.94 to 1.27) |
| Never | 1.00 | 1.00 | 1.00 | 1.00 | ||
| Use reflective materials in the dark | ||||||
| Always | 0.90 (0.73 to 1.11) | 0.84 (0.65 to 1.08) | 0.88 (0.74 to 1.05) | 0.93 (0.74 to 1.18) | 0.89 (0.66 to 1.18) | 0.90 (0.75 to 1.09) |
| Sometimes | 0.92 (0.73 to 1.15) | 0.87 (0.65 to 1.15) | 0.99 (0.81 to 1.20) | 0.85 (0.66 to 1.08) | 0.84 (0.62 to 1.13) | 1.03 (0.84 to 1.26) |
| Never | 1.00 | 1.00 | 1.00 | 1.00 | ||
*95% bootstrap CI.
RHR, ratios of HRs.