Effect of definition of ‘Prolonged’ closure time on specificity and positive predictive value for a diagnosis of non-cardiac symptoms
| Threshold | Specificity, 95% CI (%) | Positive predictive value, 95% CI (%) | Patients with non-cardiac symptoms identified (%) |
|---|---|---|---|
| 95th centile (≥160 s) | 100 (96.6 to 100) | 100 (83.9 to 100) | 6.4 (21/330) |
| 90th centile (≥138 s) | 98.1 (93.3 to 99.8) | 95.4 (84.2 to 99.4) | 12.4 (41/330) |
| 80th centile (≥117 s) | 88.6 (80.9 to 94.0) | 86.2 (77.2 to 92.7) | 22.7 (75/330) |