Chunk #13 — Methods — Statistical analysis

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Association of a single nucleotide polymorphism in neuronal acetylcholine receptor subunit alpha 5 (CHRNA5) with smoking status and with 'pleasurable buzz' during early experimentation with smoking.

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The four-level early smoking experience variables for each of the sensations were dichotomized into ‘none’ or ‘slight’ versus ‘moderate’ or ‘intense’. Phenotypic data were analyzed in SAS using χ2 and analysis of variance (ANOVA) as appropriate.