burnin1
Well-Known Member
From NORML
Study: Presence Of THC In Blood Not Associated With Crash Culpability
Investigators from the University of British Columbia compared the likelihood of crash responsibility in drivers testing positive for THC and/or other substances as compared to drug-free drivers over a six-year period (2010 to 2016).
Researchers reported, “In this multi-site observational study of non-fatally injured drivers, we found no increase in crash risk, after adjustment for age, sex, and use of other impairing substances, in drivers with THC less than 5ng/ml. For drivers with THC greater than 5ngml there may be an increased risk of crash responsibility, but this result was statistically non-significant and further study is required. … Our findings … suggest that the impact of cannabis on road safety is relatively small at present time.”
By contrast, authors reported, “There was a significantly increased risk for drivers who used alcohol, sedating medications, or recreational drugs others than cannabis.” Drivers who tested positive for the concurrent use of cannabis and alcohol possessed a higher risk of accident as compared to drivers who tested positive for alcohol alone – a finding that is consistent with other studies.
The abstract of the study, “Cannabis use as a risk factor for causing motor vehicle crashes: A prospective study,” is online here. Additional information is available in the NORML fact-sheet “Marijuana and Psychomotor Performance.”
https://blog.norml.org/2019/05/22/s...-blood-not-associated-with-crash-culpability/
Study: Presence Of THC In Blood Not Associated With Crash Culpability
- by Paul Armentano, NORML Deputy Director May 22, 2019
Investigators from the University of British Columbia compared the likelihood of crash responsibility in drivers testing positive for THC and/or other substances as compared to drug-free drivers over a six-year period (2010 to 2016).
Researchers reported, “In this multi-site observational study of non-fatally injured drivers, we found no increase in crash risk, after adjustment for age, sex, and use of other impairing substances, in drivers with THC less than 5ng/ml. For drivers with THC greater than 5ngml there may be an increased risk of crash responsibility, but this result was statistically non-significant and further study is required. … Our findings … suggest that the impact of cannabis on road safety is relatively small at present time.”
By contrast, authors reported, “There was a significantly increased risk for drivers who used alcohol, sedating medications, or recreational drugs others than cannabis.” Drivers who tested positive for the concurrent use of cannabis and alcohol possessed a higher risk of accident as compared to drivers who tested positive for alcohol alone – a finding that is consistent with other studies.
The abstract of the study, “Cannabis use as a risk factor for causing motor vehicle crashes: A prospective study,” is online here. Additional information is available in the NORML fact-sheet “Marijuana and Psychomotor Performance.”
https://blog.norml.org/2019/05/22/s...-blood-not-associated-with-crash-culpability/
