Figure 2.

Forest plots for analysis of per-patient detection of >50% stenosis. Heterogeneity is reported as I² and Cochran's Q statistic, for which a p-value is reported (α = 0.05). 95% Confidence intervals were calculated using the Clopper-Pearson method for each study and the pooled statistics. A. Per-patient sensitivity = 0.903 (0.856–0.951); I² = 22%, p = 0.27. B. Per-patient specificity = 0.779 (0.695–0.863); I² = 47%, p = 0.11. C. Per-patient PPV = 0.820 (0.747–0.894); I² = 53%, p = 0.08. D. Per-patient NPV = 0.869 (0.817–0.921); I² = 0%, p = 0.63. Sensitivity, specificity, and PPV show moderate heterogeneity while NPV has little heterogeneity.