Fig. 3

Forest plot of specificity and sensitivity estimates. a Forest plot of sensitivity estimates and 95% confidence intervals (CI). The point estimates of sensitivity from each study are shown as solid circles. Error bars are 95% CI. Circles are proportional to study size. The pooled estimate is denoted by the diamond at the bottom. b Forest plot of specificity estimates and 95% CI. The point estimates of specificity from each study are shown as solid circles. Error bars are 95% CI. Circles are proportional to study size. The pooled estimate is denoted by the diamond at the bottom