Figure 1: Forest plot of association between rs148744804 and rs76381440 SEMA4A genotypes and colorectal cancer risk.
From: Correspondence: SEMA4A variation and risk of colorectal cancer
Studies were weighted according to the inverse of the variance of the log of the OR calculated by unconditional logistic regression. Meta-analysis under a fixed-effects model was conducted using standard methods. Cochran’s Q statistic to test for heterogeneity and the I2 statistic to quantify the proportion of the total variation due to heterogeneity were calculated. Horizontal lines indicate 95% confidence intervals (CIs). Boxes indicate odds ratio (OR) point estimate; its area is proportional to the weight of the study. Diamond (and broken line) indicates overall summary estimate, with CI given by its width. Unbroken vertical line indicates null value (OR=1.0).
