Table 1.
Sample descriptives and odds ratios associated with DD and RWDD among males and females (N=2150)
| Driving after drinking | Riding with a driver who had been drinking | |||||||
|---|---|---|---|---|---|---|---|---|
| Males N=900; yes, n=250 | Females N=1250; yes, n=273 | Males N=900; yes, n=338 | Females N=1250; yes, n=492 | |||||
| OR (95% CI) | %, M (S.D.) | OR (95% CI) | %, M (S.D.) | OR (95% CI) | %, M (S.D.) | OR (95% CI) | %, M (S.D.) | |
| Age | 1.11 (.95–1.29) | 18.9 (1.1) | 1.00 (.88–1.14) | 18.6 (1.2) | 1.13 (.99–1.30) | 18.8 (1.2) | 1.00 (.89–1.12) | 18.6 (1.2) |
| Caucasian | .91 (.61–1.36) | 78.8% | .52 (.38–.73)*** | 67.8% | .69 (.49–.98)* | 74.0% | .53 (.40–.71)*** | 66.7% |
| Public Assistance | 1.07 (.69–1.67) | 20.0% | .86 (.61–1.13) | 31.5% | 1.49 (1.01–2.02)* | 23.4% | 1.76(1.31–2.37)*** | 37.6% |
| Enrolled in school | .58 (.38–.39)* | 70.8% | .80 (.54–1.18) | 75.8% | .66 (.45–.97)* | 71.9% | .88 (.62–1.23) | 76.4% |
| ED visit – injurya | .80 (.56–1.22) | 44.4% | .98 (.67–1.42) | 22.7% | .86 (.63–1.17) | 45.6% | .69 (.50-.96)* | 20.1% |
| Past injury experienceb | 1.32 (.92–1.89) | 69.2% | 1.22 (.88–1.67) | 53.9% | 1.71 (1.24–2.36)** | 69.8% | 1.73 (1.32–2.27)*** | 54.1% |
| Age of first drink | .91 (.83–.99)* | 15.3 (2.0) | .93 (.85–1.01) | 15.6 (1.9) | .91 (.83–.99)* | 15.5 (2.2) | .93 (.87–1.00) | 15.8 (2.0) |
| AUDIT-C score | 1.17 (1.10–1.25)*** | 6.0 (2.8) | 1.19 (1.12–1.27)*** | 4.7 (2.5) | 1.08 (1.02–1.15)** | 5.4 (2.9) | 1.11 (1.04–1.17)** | 4.1 (2.5) |
| Marijuana use | 1.69 (1.14–2.51)** | 80.0% | 2.33 (1.67–3.27)*** | 75.8% | 1.43 (1.02–2.00)* | 74.3% | 1.46 (1.11–1.91)** | 65.5% |
| Prescription drug misuse | 1.75 (1.16–2.62)** | 42.4% | 1.54 (1.06–2.24)* | 32.2% | 1.44 (.98–2.13) | 34.0% | 1.88 (1.33–2.65)*** | 28.9% |
| Illicit drug use | 1.79 (1.15–2.80)* | 36.0% | 1.11 (.71–1.75) | 20.9% | 1.47 (.95–2.27) | 28.1% | 1.54 (.98–2.42) | 17.9% |
| Model overview | AIC diff from null=131.4. χ2=122.7(11), p<.001 | AIC diff from null=126.7. χ2=126.8(11), p<.001 | AIC diff from null=87.3. χ2=93.4(11), p<.001 | AIC diff from null=158.0. χ2=148.9(11), p<.001 | ||||
a
Versus presenting for a medical complaint (non-injury)
b
Experience in past year. OR: adjusted odds ratio.
*
p< .05
**
p< .01
***
p< .001.
Note. Standardized predictors are as follows in each model (where possible for the variables): Model - Males DD; for Age, OR=1.27, for Age of first drink, OR=.83, for AUDIT-C score, OR=1.51, Model - Females DD; for Age, OR=1.00, for Age of first drink, OR=.86, for AUDIT-C score, OR=1.58; Model - Males RWDD; for Age, OR=1.16, for Age of first drink, OR=.83, for AUDIT-C score, OR=1.24; Model - Females DD; for Age, OR=1.01, for Age of first drink, OR=.88, for AUDIT-C score, OR=1.30.