From: Child and adolescent bicycling injuries involving motor vehicle collisions
Environmental Factors | Collision resulting in severe injuries (%) | Collision resulting in non-severe injuries (%) | Unadjusted odds ratio (95% CI) | Adjusted odds ratiob (95% CI) | Adjusted odds ratioc (95% CI) |
---|---|---|---|---|---|
n = 43 | n = 380 | ||||
Driving Conditions | |||||
Normal | 42 (97.7) | 357 (93.9) | 1.00 | 1.00 | 1.00 |
Poor | 1 (2.3) | 23 (6.1) | 0.37 (0.05–2.81) | 0.38 (0.05–3.00) | 0.40 (0.05–3.26) |
Intersection | |||||
Yes | 26 (60.5) | 252 (66.3) | 0.77 (0.41–1.48) | 1.27 (0.50–3.21) | 1.38 (0.55–3.54) |
No | 17 (39.5) | 128 (33.7) | 1.00 | 1.00 | 1.00 |
Peak Traffic Timea | |||||
Yes | 6 (14.0) | 114 (30.1) | 0.38 (0.15–0.91) | 0.37 (0.15–0.91) | 0.40 (0.16–0.99) |
No | 37 (86.0) | 264 (69.9) | 1.00 | 1.00 | 1.00 |
Unknown | 0 (0.0) | 2 (4.7) | – | – | – |
Road Type | |||||
Divided w/ Barrier | 19 (44.2) | 138 (36.3) | 1.00 | 1.00 | 1.00 |
Divided No Barrier | 6 (14.0) | 112 (29.5) | 0.39 (0.15–1.01) | 0.37 (0.14–0.99) | 0.36 (0.13–0.97) |
Undivided Two-Way | 8 (18.6) | 66 (17.4) | 0.88 (0.70–2.12) | 0.72 (0.25–2.15) | 0.63 (0.20–1.95) |
Undivided One-Way | 2 (4.7) | 8 (2.1) | 1.82 (0.39–9.19) | 1.73 (0.31–9.53) | 1.89 (0.34–10.55) |
Other | 8 (18.6) | 56 (14.7) | 1.04 (0.43–2.51) | 0.80 (0.23–2.74) | 0.70 (0.20–2.48) |
Traffic Control Device | |||||
Nothing Present | 21 (48.8) | 156 (41.1) | 1.00 | 1.00 | 1.00 |
Crosswalk | 10 (23.2) | 59 (15.5) | 1.26 (0.56–2.83) | 1.13 (0.41–3.18) | 1.13 (0.39–3.25) |
Traffic Lights | 7 (16.3) | 95 (25.0) | 0.55 (0.22–1.34) | 0.46 (0.14–1.46) | 0.45 (0.14–1.49) |
Sign Present | 3 (7.0) | 62 (16.3) | 0.36 (0.10–1.25) | 0.34 (0.08–1.39) | 0.32 (0.08–1.34) |
Unknown/Other | 2 (4.7) | 8 (2.1) | 1.86 (0.37–9.34) | 1.50 (0.27–8.34) | 1.73 (0.29–10.38) |
Hit and Run | |||||
Yes | 3 (7.0) | 52 (13.7) | 0.47 (0.14–1.59) | – | – |
No | 40 (93.0) | 328 (86.3) | 1.00 | – | – |
Light Condition | |||||
Normal | 39 (89.5) | 340 (89.5) | 1.00 | – | – |
Poor (Sunglare/Darkness) | 4 (10.5) | 34 (8.9) | 1.02 (0.35–3.04) | – | – |
Unknown | 0 (0.0) | 6 (1.6) | – | – | – |
Road Curve | |||||
Straight | 21 (48.8) | 155 (40.8) | 1.00 | – | – |
Curved | 5 (11.6) | 17 (4.5) | 2.17 (0.73–6.50) | – | – |
Unknown | 17 (39.5) | 208 (54.7) | |||
Road Grade | |||||
Flat | 25 (58.1) | 157 (41.3) | 1.00 | – | – |
Graded | 1 (2.3) | 16 (4.2) | 0.39 (0.05–3.09) | – | – |
Unknown | 17 (39.5) | 207 (54.5) | 0.52 (0.27–0.98) | – | – |
Weekend | |||||
Yes | 15 (34.9) | 83 (21.8) | 1.91 (0.98–3.74) | – | – |
No | 28 (65.1) | 296 (77.9) | 1.00 | – | – |
Unknown | 0 (0.0) | 1 (0.3) | – | – | – |