Clinical history and signs | Score |
Suspected DVT | 3.0 |
An alternative diagnosis is less likely than PE | 3.0 |
Heart rate >100 beats per min | 1.5 |
Immobilisation or surgery in the previous 4 weeks | 1.5 |
Previous DVT or PE | 1.5 |
Haemoptysis | 1.0 |
Malignancy (on treatment, treated in the past 6 months or palliative) | 1.0 |
Risk of having PE | Score range | Mean probability of PE % |
Low probability | <2 | 3.6 |
Intermediate probability | 2–6 | 20.5 |
High probability | >6 | 66.7 |
DVT: deep venous thrombosis; PE: pulmonary embolism.