Chunk #13 — 2. Material and Methods — 2.3. Measures — 2.3.5. Covariates

Source

DRD4 and susceptibility to peer influence on alcohol use from adolescence to adulthood.

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yes

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Demographic variables included participants' age at each assessment, sex, race (dichotomized as minority vs. white), and family income (parent-report at wave 4, self-report at waves 5-7). In adulthood (waves 5-7), participants' marital status was also included (married vs. not).