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Table 4 Associations between change in intention to drive after reading BAC levels with other variables

From: Perceived driving safety and estimated blood alcohol concentration (BAC) the morning after drinking amongst young Australians attending a music festival: a cross-sectional survey

Continuous Variables

Mean

SD

Mean with Change in Intention to Drive (SD)

P-value1

Change to Drive Later Crude OR (95% CI)

P-value

t

dF

   

Earlier

Later

     

Passengers in car (if driving)

2.11

1.31

2.10 (1.30)

2.78 (1.25)

0.04

1.534 (1.02 to 2.30)

0.04

−2.154

60.90

Age

21.76

3.55

22.12 (4.06)

22.15 (3.01)

0.97

    

Sleep hours

5.97

1.87

5.76 (1.43)

6.00 (3.39)

0.61

    

Units of alcohol last 24 h

12.52

6.42

11.15 (5.52)

12.32 (6.08)

0.39

    

Categorical Variables

All

Change in Intention to Drive

P-value2

χ2

dF

  
 

N

%

Earlier % (n)

Later % (n)

     

Gender

    

0.12

2.45

1

  

 Male

247

60

39 (19)

61 (30)

     

 Female

162

40

58 (15)

42 (11)

     

Licence Class

    

0.92

8.51

2

  

 No licence/Learner

15

4

0 (0)

0 (0)

     

 Provisional 1

39

9

40 (2)

60 (3)

     

 Provisional 2

147

36

48 (13)

52 (14)

     

 Full licence

208

51

44 (19)

56 (24)

     

Frequency of Alcoholic Drinks

    

0.521

2.26

1

  

 Once a week or less

198

49

53 (21)

47 (19)

     

 More than once a week

209

51

37 (13)

63 (22)

     

Frequency of Binge Drinking Sessions

    

0.69

0.753

1

  

 Once a month or less

237

58

42 (20)

58 (27)

     

 Weekly or more

172

42

50 (14)

50 (14)

     
  1. 1t test, 2-tailed significance
  2. 2Pearson chi-squared test