Skip to main content

Table 3 Comparison of external factors in BMVCs resulting in severe or non-severe injuries to youth bicyclists

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)
  1. bold indicates significant at 0.05 alpha level
  2. CI confidence interval
  3. aPeak traffic time defined as 6:00 am-8:59 am or 4 pm-5:59 pm on weekdays
  4. bAdjusted for Driving Conditions, Intersection, Peak Time, Road Type and Traffic Control Device
  5. cAdjusted for variables in bas well as cyclist age and sex