Smoking quit success genotype score predicts quit success and distinct patterns of developmental involvement with common addictive substances.

Mean v1.0 scores for these successful vs unsuccessful quitters displayed highly significant differences (p = 0.0005, one tailed t test) ( Fig 1 ).The quit success scores were significantly higher in the successful quitters than in the matched comparison group of nonquitters in ways that were not readily explained by several other comparisons ( Supplementary analysis E ).

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