Sensitivity, specificity, predictive values, likelihood ratios, accuracy, and concordance of electrocardiogram variables in comparison with echocardiography
| Variables | Sensitivity | Specificity | PPV | NPV | PLR | NLR | Accuracy | κ | P-value |
|---|---|---|---|---|---|---|---|---|---|
| RAE | 53.57% | 77.27% | 75.00% | 56.67% | 2.35 | 0.60 | 64.00% | 0.30 | 0.027* |
| LAE | 25.00% | 94.12% | 66.67% | 72.73% | 4.25 | 0.80 | 72.00% | 0.23 | 0.052 |
| RV-PO | 86.36% | 57.14% | 61.29% | 84.21% | 2.02 | 0.24 | 70.00% | 0.43 | 0.002* |
| RV-VO | 63.64% | 58.97% | 30.47% | 85.19% | 1.55 | 0.62 | 60.00% | 0.16 | 0.184 |
| LV-PO | 100.00% | 54.17% | 8.33% | 100.00% | 2.18 | 0.00 | 56.00% | 0.09 | 0.133 |
| LV-VO | 46.67% | 94.29% | 77.78% | 80.49% | 8.17 | 0.57 | 80.00% | 0.46 | < 0.001* |
| BVH | 50.00% | 62.50% | 5.26% | 96.77% | 1.33 | 0.80 | 62.00% | 0.03 | 0.709 |
PPV: positive predictive value; NPV: negative predictive value; PLR: positive likelihood ratio; NLR: negative likelihood ratio; RAE: right atrial enlargement; LAE: left atrial enlargement; RV: right ventricle; LV: left ventricle; PO: pressure overload; VO: volume overload; BVH: biventricular hypertrophy; *: concordance (agreement) between electrocardiogram and echocardiography, as measured by κ, is significant at P < 0.05