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Table 2 Odds ratiosa for risk factors commonly associated with fatal crashes occurring with adverse weather conditions

From: Adverse weather conditions and fatal motor vehicle crashes in the United States, 1994-2012

  Male driver Alcohol involvement Drug involvement No restraint use Speeding reported Urban road Poor driving record Highway Poor light condition
All adverse conditions 1.16 0.83 0.74 0.93 0.96 0.84 1.01 1.10 1.11
(1.15, 1.17) (0.82, 0.84) (0.71, 0.78) (0.92, 0.94) (0.93, 0.98) (0.83, 0.86) (1.00, 1.02) (1.09, 1.10) (1.09, 1.13)
Rain or wet conditions 1.11 0.90 0.87 0.95 0.97 0.99 1.02 1.07 1.08
(1.09, 1.13) (0.89, 0.91) (0.84, 0.90) (0.94, 0.96) (0.95, 0.99) (0.97, 1.00) (1.01, 1.03) (1.07, 1.08) (1.06, 1.10)
Snow or icy conditions 1.20 0.57 0.42 0.85 0.89 0.45 0.97 1.18 1.19
(1.18, 1.21) (0.55, 0.59) (0.37, 0.47) (0.83, 0.87) (0.82, 0.96) (0.44, 0.47) (0.96, 0.99) (1.17, 1.19) (1.17, 1.22)
  1. aEach odds ratio is the odds of the risk factor being reported in a crash which happened during adverse weather conditions divided by the odds of the risk factor occurring when no adverse weather conditions are reported