Trends in Receipt of Mental Health Treatments Among Adults in the United States, 2008-2013.

Objective: This study examined trends in the 12-month prevalence of receiving mental health treatments among adults 18 years or older and among different generational cohorts in the United States between 2008 and 2013.

Methods: We examined data from 274,900 persons 18 years or older who participated in the 2008-2013 National Surveys on Drug Use and Health (then linked to the 2011-2014 Area Health Resources Files at the county level). Multivariable logistic regressions were applied to assess trends in the model-adjusted prevalence of receiving mental health treatments.

Marijuana use and use disorders in adults in the USA, 2002-14: analysis of annual cross-sectional surveys.

Background: The study of marijuana use disorders is urgently needed because of increasing marijuana legalisation in multiple jurisdictions, the effect of marijuana use on future risk of psychiatric disorders, and deleterious effects of marijuana exposure. Thus, understanding trends of marijuana use and use disorders and examining factors that might drive these trends (eg, perceptions of harms from marijuana use) is essential.

Methods: We analysed data from US civilians aged 18 years or older who participated in annual, cross-sectional US National Surveys on Drug Use and Health from 2002 to 2014.