Summary

The Massachusetts Gambling Impact Cohort (MAGIC) is a prospective study of gambling and problem gambling conducted in Massachusetts from September 2013 to September 2019. Multi-modal recruitment was utilized to recruit a statewide sample of 3,1 39 adults, 18 and older, with the sample over-selected for individuals at higher risk of future problem gambling. The cohort was assessed five times over a six-year period with the vast majority of assessments being self-administered online. The assessment collected comprehensive information on gambling-related behavior, attitudes, motivations, context, fallacies; problem gambling; physical health; mental health; substance use and abuse; social functioning; personality; and demographics.