Chunk #18 — Method — Measurement of Externalizing Phenotypes — Tobacco Use

Source

Alcohol-related genes show an enrichment of associations with a persistent externalizing factor.

Embedded

yes

Text

Respondents were asked, “How often did you use tobacco during the last three months?” Available responses were coded: 0 = never, 1 = occasionally, 2 = weekly but not daily, 3 = daily.