Wells score (DVT)

• Active cancer (treatment ongoing, within 6 months, or palliative)+1
• Paralysis, paresis or recent plaster immobilisation of the legs+1
• Bedridden ≥ 3 days or major surgery within 12 weeks+1
• Localised tenderness along the deep venous system+1
• Entire leg swollen+1
• Calf swelling ≥ 3 cm compared with the other leg+1
• Pitting oedema confined to the symptomatic leg+1
• Collateral superficial (non-varicose) veins+1
• Previously documented DVT+1
• An alternative diagnosis is at least as likely as DVT−2

Source: NICE NG158 — Venous thromboembolic diseases

For healthcare professionals, as an aid to clinical judgement — not a substitute for it. Follow your local policy and ask a senior when in doubt.