Table 4 summarizes the meta-analysis results of dichotomous CPD (heavy/light smoking) in single-SNP analysis. Meta-analysis across all 34 samples clearly shows a highly significant association between dichotomous CPD and locus 1 (tagging rs16969968). Figure 1 displays a forest plot of the summary meta-analysis results for locus 1 (p = 5.96×10−31, OR = 1.33, 95% confidence interval (1.26–1.39)), and also the ORs in each contributing dataset.
