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Table 4 Odds ratios (OR) and 95% confidence intervals (CI) for alcohol and meal intake stratified by potential effect modifiers.

From: A case-crossover study of alcohol consumption, meals and the risk of road traffic crashes

Possible modifier Exposure
  Alcohol consumption Meal intake
  ORa 95%CI ORa 95%CI
Gender     
   Male (N = 175) 1.83 0.77-4.35 1.72 0.63-4.66
   Female (N = 151) 4.58 0.81-25.93 0.63 0.20-1.96
Age     
   <25 years (N = 57) 5.00 0.43-57.31 0.55 0.08-3.59
   ≥ 25 years (N = 269) 2.10 0.99-4.44 0.98 0.45-2.11
Level of education (high school or higher)     
   No (N = 110) 5.99 1.04-34.57 2.09 0.41-10.60
   Yes (N = 216) 2.16 0.91-5.14 0.64 0.28-1.47
Vehicle     
   Car, van, truck (N = 234) 2.55 1.04-6.25 0.81 0.36-1.82
   Motorcycle (N = 64) 2.68 0.50-14.26 1.02 0.15-6.82
   Bicycle (N = 28) 2.99 0.09-99.06 0.83 0.02-31.40
Driving license held for (only motor-vehicle drivers)     
   <5 years (N = 41) 9.99 0.46-217.78 0.61 0.05-7.34
   ≥ 5 years (N = 257) 1.96 0.89-4.29 0.79 0.36-1.73
Driver at fault     
   Yes (N = 80) 21.22 2.31-194.79 0.82 0.16-4.18
   Yes or partially (N = 110) 10.25 2.42-43.33 0.95 0.24-3.77
   No (N = 214) 1.12 0.47-2.69 0.82 0.36-1.85
Habitual consumption of 12 or more drinks a month     
   No (N = 211) 4.17 0.72-24.16 0.77 0.29-2.05
   Yes (N = 115) 1.63 0.67-3.96 1.31 0.47-3.64
  1. a From conditional logistic regression models including alcohol consumption, meal intake and time-of-day.