Figure 4

Hierarchical summary receiver operating characteristic (HSROC) curves and results of bivariate analysis for ROMA to predict EOC. Results of bivariate analysis: estimates of each studies (the squares), the summary point (solid circle), 95% confidence region (the small ellipse), 95% prediction region (the big ellipse) and HSROC (solid line) were shown. Each study is represented by each square in the meta-analysis. The size of the square indicates the size of each study.