Wells’ score and criteria for DVT and PE
| Wells’ score for DVT | |
| Clinical characteristics | Score |
| Active cancer receiving cancer treatment within the past 6 months or currently under palliative care | 1 |
| Paralysis, paresis or recent cast immobilisation of the lower extremities | 1 |
| Recently bedridden for >3 days, or major surgery within the past 3 months | 1 |
| Localised tenderness along the distribution of deep venous systems | 1 |
| Entire leg swelling | 1 |
| Calf swelling at 3 cm larger than that on the asymptomatic side (measure 10 cm below tibial tuberosity) | 1 |
| Pitting oedema confined to the symptomatic leg | 1 |
| Collateral superficial veins | 1 |
| Previously diagnosed DVT | 1 |
| Alternative diagnosis at least as likely as DVT | −2 |
| Wells scoring system for DVT: −2 to 0: low probability; 1–2 points: Moderate probability; 3–8 points: high probability. | |
| Wells’ score for PE | |
| Criteria | Points |
| Clinical signs of symptoms of VTE | 3 |
| No alternative diagnosis | 3 |
| Heart rate >100 beat/min | 1.5 |
| Immobilisation >3 days or surgery in past 4 weeks | 1.5 |
| Previous history of PE or VTE | 1.5 |
| Haemoptysis | 1 |
| Malignancy with active treatment in past 6 months or palliative care | 1 |
| Wells scoring system for PE: <2 points: low probability; 2–6 points: moderate probability; >6 points: high probability | |
DVT, deep vein thrombosis; PE, pulmonary embolism; VTE, venous thromboembolism.