High-risk symptoms and quantitative faecal immunochemical test accuracy: Systematic review and meta-analysis

Figure 5 Funnel scatterplot to evaluate publication bias for studies using OC-Sensor^® with different thresholds to detect colorectal cancer. Each point in the plot represents a study with its diagnostic odds ratio (dOR) and sample size. A symmetric image around an axis traced by the pooled dOR value suggests absence of publication bias. Asymmetry with study concentration on the right side (the side with higher diagnostic odds ratio values) suggests publication bias with less negative studies published. dOR: Diagnostic odds ratio.