A study out of RAND Corporation has linked alcohol and marijuana use to sleep patterns in teens, after controlling for other risk factors. The study explained that for every ten minutes later than a teen goes to bed, there is a 6% increased likelihood of either marijuana or alcohol use. Teens who had trouble sleeping were also 55% more likely to have drank within the month. Despite the correlation that this study has revealed, the RAND team explains that further, long-term research will need to be conducted to prove causation.

“‘Our findings suggest that sleep issues are independently associated with alcohol and marijuana use for teens, not just a marker for other risk factors, such as depression,’ said Wendy Troxel, the study’s lead author and a behavioral scientist at RAND, a nonprofit research organization. ‘Better understanding of the association between sleep and substance use is important for parents, schools and others involved in alcohol and drug prevention efforts for this age group.'”

Click here to read the full release from RAND Corporation for Science Daily.