Fig. 4
From: Variation rs9929218 and risk of the colorectal Cancer and adenomas: A meta-analysis
Every point represents a separate study for the indicated association. Funnel plot (a) for publication bias analysis of the selected studies investigating the association between rs9929218 polymorphism and CRC/CRA. The X-axis stands for the ORs and the Y-axis is the standard error for each of the 12 studies. A linear regression based approach proposed by Egger test (b) and Begg plot (c) is used to evaluate the asymmetry of the funnel plot. CI, confidence interval. SND, standard normal deviate