Patient distribution according to ECG and left ventricular function
| EF ⩾ 50% | EF < 50% | Sensitivity (%) | Specificity (%) | NPV (%) | Cost savings (£) | |
|---|---|---|---|---|---|---|
| Cardiologist A | ||||||
| Normal | 136 | 2 | 96.3 | 40.4 | 98.6 | 33565 |
| Abnormal | 201 | 52 | ||||
| Cardiologist B | ||||||
| Normal | 126 | 2 | 96.3 | 37.4 | 98.4 | 31132 |
| Abnormal | 211 | 52 | ||||
| Trainee | ||||||
| Normal | 167 | 3 | 94.4 | 49.6 | 98.2 | 41348 |
| Abnormal | 170 | 51 | ||||
| QRS score 4-150 | ||||||
| 0 | 140 | 4 | 92.6 | 41.5 | 97.2 | 35024 |
| ⩾ 1 | 197 | 50 | ||||
↵4-150 29 point QRS score.
EF, ejection fraction; NPV, negative predictive value.