
| Clinical symptoms of DVT | No Yes |
| Other diagnosis less likely than PE | No Yes |
| Heart rate greater than 100 beats per minute | No Yes |
| Immobilization or surgery within past 4 weeks | No Yes |
| Previous DVT or PE | No Yes |
| Hemoptysis | No Yes |
| Malignancy | No Yes |

| Clinical feature | Points |
|---|---|
| Clinical symptoms of DVT | 3 |
| Other diagnosis less likely than PE | 3 |
| Heart rate greater than 100 beats per minute | 1.5 |
| Immobilization or surgery within past 4 weeks | 1.5 |
| Previous DVT or PE | 1.5 |
| Hemoptysis | 1 |
| Malignancy | 1 |
| Total points: | |
Where,
Risk score interpretation (probability of PE):
Reference:
Wells PS, Anderson DR, Rodger M, Ginsberg JS, Kearon C, Gent M, et al. Derivation of a simple clinical model to categorize patients' probability of pulmonary embolism: increasing the model utility with the SimpliRED D-dimer. Thromb Haemost 2000;83:418.