The rs1051730–rs16969968 genetic variant in the nicotinic receptor does
not influence smoking cessation outcomes on NRT.
Effect sizes (odds ratios) from four clinical studies [61, 79–81]
comprising NRT treatment arms show the likelihood of successful smoking
cessation at end-of-treatment for smokers with the rs1051730-rs16969968 risk
allele (rs1051730 T allele or rs16969968 A allele) relative to smokers with the
rs1051730-rs16969968 reference allele (rs1051730 C or rs16969968 G allele). This
figure is adapted from a meta-analysis performed by Leung et
al, 2015 [7]. The
overall effect size from the meta-analyzed data is also depicted. Results were
generated from additive genetic models adjusting for age and sex. No significant
heterogeneity was present in the meta-analysis
(I2=50.6%; P=0.07). The dashed vertical line
represents the overall effect size, which was 0.97. Abbreviations: PiP, Patch in
Practice study; CI, confidence interval