Table 4.
Logistic Regression for the Likelihood of Impaired Drivers (BAC ≥ .08) Involved in Different Types of Crashes
| Nonfatal/Property Damage Only | Fatal | |||||||
|---|---|---|---|---|---|---|---|---|
| Single Vehicle | Multiple Vehicle | Single Vehicle | Multiple Vehicle | |||||
| Coeff | p value | Coeff | p value | Coeff | p value | Coeff | p value | |
| 4 p.m.– 7 p.m. | −2.29 | <.0001 | −1.50 | <.0001 | −1.01 | <.0001 | −0.89 | <.0001 |
| 7 p.m.– 9 p.m. | −0.97 | 0.029 | −0.51 | 0.003 | −0.21 | <.0001 | −0.20 | 0.01 |
| 12 a.m.–3 a.m. | 1.43 | 0.006 | 0.49 | 0.019 | 0.93 | <.0001 | 0.90 | <.0001 |
| Ref: 9 p.m.-midnight | ||||||||
| Weekend | −0.19 | 0.615 | 0.18 | 0.191 | 0.08 | <.0001 | 0.14 | 0.01 |
| Age 15–20 | −0.14 | 0.794 | 0.07 | 0.728 | −0.48 | <.0001 | −0.62 | 0.00 |
| Age 21–25 | −0.87 | 0.140 | −0.08 | 0.717 | 0.35 | <.0001 | 0.44 | 0.04 |
| Age 26–34 | −0.45 | 0.288 | 0.09 | 0.562 | 0.64 | <.0001 | 0.68 | 0.00 |
| Age 35–64 | * | * | −0.97 | 0.043 | 0.54 | <.0001 | 0.46 | 0.01 |
| Ref: Age 65+ | ||||||||
| Female | −0.03 | 0.945 | −0.33 | 0.019 | −0.38 | <.0001 | −0.40 | <.0001 |
| Intercept | −0.42 | 0.274 | −0.92 | <.0001 | −0.48 | <.0001 | −0.67 | <.0001 |