Multiple logistic regression of positive breath alcohol concentration test on gender, age, day of the week, time of presentation and postcode (prospective dataset)
| OR | SE | z | P>z | 95% CI | |
|---|---|---|---|---|---|
| Gender | |||||
| Male | 1.00 | ||||
| Female | 0.58 | 0.07 | −4.59 | <0.01 | 0.46 to 0.73 |
| Age group (years) | |||||
| 65 and over | 1.00 | ||||
| 45–64 | 4.03 | 1.11 | 5.08 | <0.01 | 2.35 to 6.90 |
| 25–44 | 5.31 | 1.39 | 6.38 | <0.01 | 3.18 to 8.87 |
| 18–24 | 5.78 | 1.52 | 6.68 | <0.01 | 3.45 to 9.66 |
| Day of week | |||||
| Monday | 1.00 | ||||
| Tuesday | 1.53 | 0.39 | 1.69 | 0.09 | 0.93 to 2.52 |
| Wednesday | 1.64 | 0.41 | 2.00 | 0.05 | 1.01 to 2.66 |
| Thursday | 1.50 | 0.38 | 1.60 | 0.11 | 0.91 to 2.48 |
| Friday | 2.49 | 0.63 | 3.61 | <0.01 | 1.52 to 4.10 |
| Saturday | 3.74 | 0.88 | 5.59 | <0.01 | 2.35 to 5.94 |
| Sunday | 3.27 | 0.76 | 5.10 | <0.01 | 2.07 to 5.15 |
| Time of day | |||||
| 06:00–11:59 | 1.00 | ||||
| Noon–17:59 | 0.82 | 0.18 | −0.91 | 0.36 | 0.54 to 1.25 |
| 18:00–23:59 | 3.86 | 0.72 | 7.26 | <0.01 | 2.68 to 5.56 |
| Midnight–05:59 | 17.04 | 3.19 | 15.17 | <0.01 | 11.81 to 24.59 |
| Area | |||||
| NE postcode | 1.00 | ||||
| Other | 1.92 | 0.38 | 3.27 | <0.01 | 1.30 to 2.83 |