Federal Study: THC-Positive Drivers Not More Likely To Be Involved In Motor Vehicle Crashes | NORML Blog, Marijuana Law Reform

  • Authors reported that drivers who tested positive for any amount of THC possessed an unadjusted, elevated risk of accident of 25 percent (Odds Ratio=1.25) compared to controls (drivers who tested negative for any drug or alcohol). However, this elevated risk became insignificant (OR=1.05) after investigators adjusted for demographic variables, such as the drivers’ age and gender. After researchers controlled for both demographic variables and the presence of alcohol, THC-positive drivers’ elevated risk of accident was zero (OR=1).
  • By contrast, researchers reported that drivers who tested positive for low levels of alcohol possessed a statistically significant risk of accident, even after controlling for demographic variables (e.g., Drivers with a BAC of 0.03 possessed a 20 percent greater risk of motor vehicle accident [OR=1.20] compared to controls). Drivers with BAC levels of 0.05 possessed a greater than two-fold risk of accident (OR=2.07) while motorists with BAC levels of 0.08 possessed a nearly four-fold risk of accident (OR=3.93).

    Researchers did not analyze drivers’ THC levels to similarly estimate whether higher or lower THC levels may impact crash risk in a dose-dependent manner, as has been previously reported in some separate analyses of fatal crash data.

    Authors concluded, “This finding indicates that these other variables (age, gender, ethnicity, and alcohol use) were highly correlated with drug use and account for much of the increased (crash) risk associated with the use of illegal drugs and THC.”

    The study’s finding contradict allegations by NIDA and others that “marijuana use more than doubles a driver’s risk of being in an accident,” but are largely consistent with those of a 2013 literature review published in the journal Accident Analysis and Prevention which reported that cannabis-positive drivers did not possess a statistically significant risk of a either fatal accident or a motor vehicle accident causing injury.

    See NORML’s white paper on cannabis and psychomotor performance here.

Federal Study: THC-Positive Drivers Not More Likely To Be Involved In Motor Vehicle Crashes | NORML Blog, Marijuana Law Reform.

31 States Are Considering Marijuana Law Reform, Is Yours One of Them? | NORML Blog, Marijuana Law Reform

  • by Erik Altieri, NORML Communications Director
    February 19, 2015

  • rethinklogohd1At post time, there are 31 states that currently have pending marijuana law reform legislation. These measures deal with a wide array of topics including decriminalization, record expungement, medical access, and full legalization. 2015 is shaping up to be one of the most active legislative sessions on record for the marijuana legalization movement, but these bills won’t pass themselves. It is absolutely crucial that you, the stakeholders and voters, get engaged in the process and apply pressure to your state lawmakers to urge them to support these measures.

    Reaching out to your state officials is as simple as a few clicks of the mouse using NORML’s Take Action Center. Simply consult the landing page to see if your state has pending legislation, click on that legislation, enter your zip code, and a pre-written email will be sent on your behalf. Once you have taken this initial step, we strongly encourage you to follow up by contacting your lawmakers directly and speaking to them on the phone. If politicians don’t hear from their constituents on these pieces of legislation, they remain unlikely to support them when they are called for a vote. Click HERE to see the full list of pending legislation. Recent additions include:

    Don’t forget to check out the full listing here and check back frequently as new alerts are added and old ones are updated with the most recent information.

    Together, we can make the country a little more NORML. Together, we WILL legalize marijuana nationwide.

31 States Are Considering Marijuana Law Reform, Is Yours One of Them? | NORML Blog, Marijuana Law Reform.