Chunk #23 — 2. Methods — 2.2. Variable definitions — 2.3.1. Analyses

Source

Parent, sibling and peer influences on smoking initiation, regular smoking and nicotine dependence. Results from a genetically informative design.

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Descriptive analyses of all independent and outcome variables are expressed as percentages for categorical variables. Cross-tabulations and chi-square tests of significance were used to examine bivariate associations among each predictor variable and offspring ever trying a cigarette, offspring regular smoking and offspring ND.