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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.