Fig. 3

Plots of sensitivity-based and accumulative-based analysis results for the meta-analyses combined all chosen studies. a The Y-axis represents the combined OR, and the X-axis for each single study left out in sequence from the chosen articles. The diamond symbols stand for the combined OR, and the bottom and top horizontal bars represent the 95% confidence intervals (CIs). b The pooled OR of the rs6265 polymorphism for smoking persistence was shown against years of publication among all chosen studies. The Y-axis represents the pooled OR and the X-axis for the years of studies published relative to the pooled OR. The diamond symbols show that the pooled OR, and each vertical line with horizontal bars labels the 95% CI