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Table 4 Estimated odds ratios and 95% confidence intervals of fatal crash involvement according to driver BAC level stratified by marijuana status in the continental United States, selected time periods on Fridays and Saturdays, July 20 through December 1, 2006, 2007 and 2008

From: Interaction of marijuana and alcohol on fatal motor vehicle crash risk: a case–control study

Testing Result Marijuana Negative Marijuana Positive
BAC level aAdjusted OR 95% CI aAdjusted OR 95% CI
0 1.00 Reference 1.00 Reference
0.01–0.07 2.81 2.25, 3.51 1.81 0.93, 3.50
≥0.08 60.96 49.37, 75.25 82.12 41.73,161.61
  1. BAC Blood Alcohol Content, g/dL, CI Confidence Interval OR Odds Ratio
  2. aAdjusted for age, sex and region