Test results from the index tests and reference standard
| Reference standard (12-lead ECG, cardiologist) | |||
| Positive AF | Negative AF | Total | |
| Index test (radiograph-CT-ECG) | |||
| Positive AF | 41 | 35 | 76 |
| Negative AF | 27 | 1235 | 1262 |
| Total | 68 | 1270 | 1338 |
| Index test (nurse-ECG) | |||
| Positive AF | 66 | 0 | 66 |
| Negative AF | 2 | 1270 | 1272 |
| Total | 68 | 1270 | 1338 |
AF, atrial fibrillation;nurse-ECG, 12-lead ECG assessed by nurses; radiograph-CT-ECG, CT-related single-lead ECG assessed by radiographers.