Pretest Probability of Pulmonary Embolism
| Clinical Feature | Points |
|---|---|
| Suspected DVT | 3 |
| An alternative diagnosis is less likely than PE | 3 |
| Heart rate > 100 beats per minute | 1.5 |
| Immobilization or surgery in the previous 4 weeks | 1.5 |
| Previous DVT or PE | 1.5 |
| Hemoptysis | 1 |
| Malignancy (on treatment, treated in the past 6 months, or palliative) | 1 |
| Score | Probability of PE | PE Prevalence (%) |
|---|---|---|
| 0-2 points | Low | 3.6 |
| 3-6 points | Moderate | 20.5 |
| > 6 points | High | 66.7 |
Adapted from: Thromb Haemost 2000;83:416.