Table 1.

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.