Fig. 3

Forest plots of pooled sensitivity and specificity (Include Huang Yuhao2). In the forest plot, each study is represented by a square whose size is proportional to its statistical weight. Each point in the plot represents an individual study’s sensitivity or specificity estimate. The horizontal lines extending from the squares denote the 95% confidence intervals. Red vertical lines represent the pooled sensitivity and specificity of the overall effect estimate. The forest plot demonstrates a high degree of heterogeneity in sensitivity across the studies