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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