Table 1

Wells’ score and criteria for DVT and PE

Wells’ score for DVT
Clinical characteristicsScore
Active cancer receiving cancer treatment within the past 6 months or currently under palliative care1
Paralysis, paresis or recent cast immobilisation of the lower extremities1
Recently bedridden for >3 days, or major surgery within the past 3 months1
Localised tenderness along the distribution of deep venous systems1
Entire leg swelling1
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 leg1
Collateral superficial veins1
Previously diagnosed DVT1
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
Clinical signs of symptoms of VTE3
No alternative diagnosis3
Heart rate >100 beat/min1.5
Immobilisation >3 days or surgery in past 4 weeks1.5
Previous history of PE or VTE1.5
Malignancy with active treatment in past 6 months or palliative care1
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.