Concurrent Use of Tobacco and Cannabis and Internalizing and Externalizing Problems in US Youths

Concurrent Use of Tobacco and Cannabis and Internalizing and Externalizing Problems in US Youths, in JAMA Network Open

key takeaway: "Concurrent use was associated with almost twice the odds of reporting higher levels of externalizing problems compared with tobacco or cannabis use exclusively, but this association did not hold for internalizing problems."