Table 2.

Simplified pulmonary embolism Wells’ score [23, 25]

Clinical feature	Original score	Simplified score
Clinical signs and symptoms of DVT (minimum of leg swelling and pain with palpation of the deep veins)	3	1
An alternative diagnosis is less likely than PE	3	1
Heart rate ≥100 beats per minute	1.5	1
Immobilisation (for >3 days) or surgery in the previous 4 weeks	1.5	1
Previous DVT/PE	1.5	1
Haemoptysis	1	1
Active cancer	1	1
Outcome
PE unlikely:	Score ≤4	Score 0 or 1
PE likely:	Score >4	Score ≥2

DVT deep vein thrombosis, PE pulmonary embolism