Table 3.
Estimated odds ratios (ORs) and 95% confidence intervals (CIs) of fatal 2-vehicle crash initiation by driver marijuana and alcohol positivity status, Fatality Analysis Reporting System, 2011–2016
| Marijuana | Alcohol | Crude | Adjusteda | ||
|---|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | ||
| Negative | Negative | 1.00 | reference | 1.00 | reference |
| Positive | Negative | 1.81 | 1.58, 2.09 | 1.53 | 1.31,1.77 |
| Negative | Positive | 4.70 | 4.11, 5.39 | 4.95 | 4.28, 5.72 |
| Positive | Positive | 7.46 | 5.72, 9.72 | 6.76 | 5.12, 8.94 |
Abbreviations: OR Odds ratio, CI Confidence interval
aAdjusted for age, sex, and previous driving history within the past 3 years (i.e., crash, license suspension, driving while impaired conviction, and speeding conviction)