Forest plot of studies included in meta-analysis BV – CIN.

<p>Each study is represented by a black square and a horizontal line, which corresponds to the odds ratio (OR) and its symmetric 95% confidence interval (CI). The area of the square reflects the weight each study contributes to the meta-analysis. The diamond at the bottom of the graph represents the combined OR and its 95% CI, calculated using a random effects model. The solid vertical line corresponds to no association (OR 1.0), the dotted vertical line to the combined OR (1.51). The OR (or estimates ES), 95% CI and weights are also given in tabular form.