Fig. 2
From: Zingiberaceae extracts for pain: a systematic review and meta-analysis
A funnel plot for pain, showing standard error plotted against effect size (SMD). Each data point represents one RCT included in the meta-analysis. The plot was not completely symmetrical, indicating potential bias, but bias could not be concluded due to a lack of statistical significance (Egger’s test, P = 0.10). A high degree of inconsistency between studies (I2 = 87.5) may contribute to the asymmetry of the funnel plot