PEARL (previous admissions, extended Medical Research Council (eMRC) dyspnoea score, age, right-sided heart failure, left-sided heart failure) indices and weighting [68]
| Weighting | |
| Previous admissions (≥2) | 3 |
| eMRC dyspnoea score 4 | 1 |
| eMRC dyspnoea score 5a | 2 |
| eMRC dyspnoea score 5b | 3 |
| Age ⩾80 years | 1 |
| Left ventricular failure | 1 |
| Right ventricular failure | 1 |
| Maximum PEARL score | 9 |