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Chunk #4 — 2. Materials and Methods — 2.1. Study Population and Design

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Age trends in rates of substance use disorders across ages 18-90: Differences by gender and race/ethnicity.
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This study used data from the National Epidemiologic Survey of Alcohol and Related Conditions–III (NESARC-III), a nationally representative, cross-sectional study of the non-institutionalized adult population in the US collected in 2012–2013 (Grant et al., 2014; 2015). Participants were recruited through a multi-stage sampling plan, with oversamples of ethnic minority respondents. The overall response rate was 60%. The final sample contained 36,309 participants (44% male; 53% White, 21% Black, 19% Hispanic/Latino, 6% other race/ethnicity; Mage = 45.6, SD = 17.5).