0 ng/mL). Risk estimates were adjusted for age, sex, and presence of other impairing substances.

FINDINGS:

We obtained toxicology results on 3005 injured drivers and police reports on 2318. Alcohol was detected in 14.4% of drivers, THC in 8.3%, other drugs in 8.9% and sedating medications in 19.8%. There was no increased risk of crash responsibility in drivers with THC<2ng/mL or 2 View the Original article

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