Diagnostic performance of ECG criteria in all cohorts
| All cohorts | True-positive test result | False-negative test result | True-negative test result | False-positive test result | Accuracy % (95% CI) | Sensitivity % (95% CI) | Specificity % (95% CI) | NPV % (95% CI) | PPV % (95% CI) |
| ECG criteria 1 (5 points) | 1 | 74 | 172 | 0 | 70 (64 to 76) | 1 (0 to 7) | 100 (98 to 100) | 70 (64 to 75) | 100 (21 to 100) |
| ECG criteria 2 (3 points) | 2 | 73 | 171 | 1 | 70 (64 to 76) | 3 (1 to 9) | 99 (97 to 100) | 70 (64 to 76) | 67 (21 to 94) |
| ECG criteria 3 (2 points) | 5 | 70 | 164 | 8 | 68 (62 to 74) | 7 (2 to 15) | 95 (91 to 98) | 70 (64 to 76) | 39 (18 to 65) |
| ECG score ≥3 points | 2 | 73 | 171 | 1 | 70 (64 to 76) | 3 (0 to 9) | 99 (97 to 100) | 70 (69 to 71) | 67 (16 to 96) |
| Alternative ECG criteria 1 (2 points) | 8 | 67 | 169 | 3 | 72 (66 to 77) | 11 (5 to 20) | 98 (95 to 100) | 72 (66 to 77) | 72 (42 to 91) |
| Alternative ECG score ≥3 points | 9 | 66 | 166 | 6 | 71 (65 to 76) | 12 (6 to 22) | 97 (93 to 99) | 72 (70 to 73) | 60 (36 to 80) |
NPV, negative predictive value; PPV, positive predictive value.