Table 2 Blood alcohol concentration (BAC) readings by demographics of survey respondents and time of day (N = 684)
|  | Total | Alcohol Yes | Alcohol No | X2 (p value) comparing alcohol yes to alcohol no | X2 comparing BAC < 0.05% to BAC ≥0.05% | |||||
|---|---|---|---|---|---|---|---|---|---|---|
|  | BAC 0.001–0.049% | BAC ≥0.050% | ||||||||
| Â | N | % | N | % | N | % | N | % | ||
Total | 684 | 100.0 | 60 | 8.8 | 49 | 7.2 | 575 | 84.1 | – | – |
Sex | ||||||||||
 Male | 331 | 48.4 | 25 | 7.6 | 27 | 8.2 | 279 | 84.3 | 0.024 (p = 0.876) | 0.952 (p = 0.329) |
 Female | 353 | 51.6 | 35 | 9.9 | 22 | 6.2 | 296 | 83.9 | ||
Age group | ||||||||||
 18–34 years | 335 | 49.0 | 36 | 10.7 | 33 | 9.9 | 266 | 79.4 | 10.649 (p = 0.001) | 7.128 (p = 0.008) |
 35–54 years | 251 | 36.7 | 17 | 6.8 | 15 | 6.0 | 219 | 87.3 | 3.006 (p = 0.083) | 0.841 (p = 0.359) |
 55+ years | 98 | 14.3 | 7 | 7.1 | 1 | 1.0 | 90 | 91.8 | 5.158 (p = 0.023) | 6.491 (p = 0.006)* |
Remoteness classification of respondent’s residential postcode | ||||||||||
 Major Cities | 123 | 18.0 | 10 | 8.1 | 0 | 0.0 | 113 | 91.9 | 7.269 (p = 0.007) | 12.124 (p < 0.001)* |
 Inner Regional | 391 | 57.2 | 37 | 9.5 | 40 | 10.2 | 314 | 80.3 | 8.558 (p = 0.003) | 10.989 (p = 0.001) |
 Outer Regional, Remote and Very Remote | 146 | 21.3 | 11 | 7.5 | 9 | 6.2 | 126 | 86.3 | 0.872 (p = 0.350) | 0.433 (p = 00.511) |
 Unknown/International | 24 | 3.5 | 2 | 8.3 | 0 | 0.0 | 22 | 91.7 | – | – |
Country of Birth | ||||||||||
 Australia | 577 | 84.4 | 53 | 9.2 | 46 | 8.0 | 478 | 82.8 | 4.112 (p = 0.043) | 3.626 (p = 0.065)* |
 Outside Australia | 107 | 15.6 | 7 | 6.5 | 3 | 2.8 | 97 | 90.7 | ||
IRSAD classification of respondent’s residential postcode | ||||||||||
 Low | 118 | 17.3 | 13 | 11.0 | 16 | 13.6 | 89 | 75.4 | 5.659 (p = 0.017) | 16.462 (p < 0.001)* |
 High | 113 | 16.5 | 14 | 12.4 | 0 | 0.0 | 99 | 87.6 | ||
 Other/Unknown/International | 453 | 66.2 | 33 | 7.3 | 33 | 7.3 | 387 | 85.4 | – | – |
Time of day | ||||||||||
 Morning (6:01 am to 12 pm) | 196 | 28.7 | 11 | 5.6 | 0 | 0.0 | 185 | 94.4 | 21.855 (p < 0.001) | 21.199 (p < 0.001)* |
 Afternoon (12:01 pm to 6 pm) | 476 | 69.6 | 49 | 10.3 | 42 | 8.8 | 385 | 80.9 | 11.831 (p = 0.001) | 6.484 (p = 0.011) |
 Evening (6:01 pm to 12 am) | 12 | 1.8 | 0 | 0.0 | 7 | 58.3 | 5 | 41.7 | 16.390 (p < 0.001) | 48.088 (p < 0.001)* |