Table 2

Results of multivariate analyses for the odds of fatality among 52,131 vehicles involved in collisions between 2001 and 2006 on Ontario’s 400-series highways
Risk factor AOR* 95%CI
Highway
401 1.00 ref
400 0.97 0.67 - 1.39
402 0.44 0.20 - 0.99
403 0.48 0.29 - 0.80
404 0.20 0.10 - 0.41
405 6.89 2.16 - 21.98
406 0.78 0.36 - 1.67
409 0.20 0.03 - 1.49
410 0.33 0.14 - 0.78
416 0.25 0.08 - 0.70
417 0.83 0.44 - 1.51
420 0.68 0.09 - 5.21
427 0.75 0.36 - 1.65
Season
Winter 1.00 ref
Spring 1.23 0.84 - 1.82
Summer 1.58 1.08 - 2.29
Fall 1.62 0.71 - 1.54
Day of the Week
Sunday 1.00 ref
Monday 1.06 0.66 - 1.70
Tuesday 0.77 0.46 - 1.25
Wednesday 0.97 0.61 - 1.55
Thursday 1.00 0.64 - 1.57
Friday 1.28 0.79 - 2.10
Saturday 1.01 0.64 - 1.57
Time Period
Evening (8 pm-12 am) 1.00 ref
Night (12 am-4 am) 1.67 1.07 - 2.59
Early Morning (4 am-8 am) 0.63 0.39 - 1.00
Morning (8 am-12 pm) 0.55 0.36 - 0.85
Afternoon (12 pm-4 pm) 0.63 0.38 - 1.04
Early Evening (4 pm-8 pm) 0.69 0.45 - 1.05
Sex
Male 1.00 ref
Female 0.84 0.76 - 0.91
Age Group
Adolescence 1.00 ref
Early Adulthood 1.52 1.01 - 2.29
Middle Adulthood 1.82 1.20 - 2.75
Late Adulthood 2.36 1.46 - 4.06
Environment
Clear 1.00 ref
Rain 0.76 0.49 - 1.15
Snow 0.93 0.57 - 1.51
Frozen Rain 1.49 0.66 - 3.39
Drifting Snow 7.39 2.21 - 24.78
Wind 5.00 1.34 - 18.73
Fog 2.78 1.11 - 6.96
Other 1.72 0.34 - 8.58
Road Characteristic
Undivided 1-Way 1.00 ref
Undivided 2-Way 3.74 1.37 - 10.28
Dividing Barrier 1.28 0.54 - 3.03
Divided 4.76 1.92 - 11.59
Ramp Road 0.52 0.20 - 1.36
Collector 0.27 0.09 - 0.79
Expressway 0.44 0.17 - 1.26
Transfer 0.37 0.04 - 3.13

* AOR = Adjusted Odds Ratio, CI = Confidence interval.

Rzeznikiewiz et al.

Rzeznikiewiz et al. BMC Public Health 2012 12:1125   doi:10.1186/1471-2458-12-1125

Open Data