Mining social media data on marijuana use for Post Traumatic Stress Disorder

BackgroundWe seek to evaluate factors that could potentially impact the public's attitudes to PTSD related marijuana use on Twitter. MethodsWe collected tweets that contained the PTSD and Post Trauma Stress Disorder from August 1, 2015 to April 15, 2016 (n=1,253,872 tweets). A Nave Bayes model was constructed to classify tweets into two opinion polarities (support vs. neutral/against marijuana use for PTSD). ResultsThe marijuana related tweets were predominated by the supporting opinions (89.6%). The public opinions about marijuana use for PTSD on Twitter were significantly associated with state-level legislation. States that legalized medical and recreational marijuana use had the highest prevalence of support tweets (1.30.6), followed by the states that legalized medical but not recreational use (0.50.3) and the states that had no laws legalizing marijuana (0.20.1, p<0.0001). A higher prevalence of support tweets was associated with states with a lower proportion of youth (r=0.35, p=0.01) and a higher education rate (r=0.38, p=0.006). ConclusionTwitter data suggest a proliferation of supporting marijuana use for PTSD treatments, especially in the states that legalized medical and/or recreational use of marijuana. We found a proliferation of PTSD tweets that support marijuana use on Twitter.The prevalence of supporting marijuana use was correlated with state legal statues.Age, education and income were associated with the prevalence of support tweets.Educational campaigns on adverse effects of marijuana use are critically needed.

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