P values for SNPs significantly associated with at least one smoking-related phenotype and their corresponding odds ratios and 95% confidence intervals under the additive and dominant model.

(1) OR  =  odds ratio; CI  =  confidence interval; SI  =  smoking initiation; SC  =  smoking cessation, SQ  =  smoking quantity. (2) Significant associations at the 0.05 level before Bonferroni correction for multiple testing are given in bold and those significant after Bonferroni correction for multiple testing are in bold and underlined (corrected P value at a 0.05 significance level is 0.0016 ( = 0.05/32). (3) Superscripts indicate the genetic model used in the analysis: a  =  additive and d  =  dominant. (4) For each sample, age, sex, and area were used as covariates.