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Forest plot of risk ratio of polycystic ovary syndrome (PCOS) female individuals to have periodontitis (PD) (p-value < 0.0001). Mean effect size estimates have been calculated with 95% confidence intervals and are shown in the figure. The size of the squares is proportionate to the study sample size, continuous horizontal lines and diamonds width represents 95% confidence interval. Diamond and the vertical dotted line represent the overall pooled estimate.
