Figure 2
Effect of chronic hepatitis B infection during pregnancy on the occurrence of gestational diabetes mellitus using a random-effects model. OR: odds ratio; CI: confidence interval; CHB: chronic hepatitis B infection; GDM: gestational diabetes mellitus. Notes: The black boxes denote the ten studies used for this analysis; the hollow boxes with the same size denote the four studies that were excluded from the analysis. R1, R2, R3 and R4 denote the studies in the order of their removal during the process for the reduction of Higgins’ I2.