Table 2.

Wells Prediction Rule for Diagnosing Pulmonary Embolism: Clinical Evaluation Table for Predicting Pretest Probability of Pulmonary Embolism

Clinical CharacteristicScore
Note: Clinical probability of pulmonary embolism: low 0–1; intermediate 2–6; high ≥ 7.
Reprinted from Am J Med, Vol 113, Chagnon I, Bounameaux H, Aujesky D, et al, Comparison of two clinical prediction rules and implicit assessment among patients with suspected pulmonary embolism, pp 269–275, Copyright 2002, with permission from Elsevier.
Previous pulmonary embolism or deep vein thrombosis+1.5
Heart rate >100 beats per minute+1.5
Recent surgery or immobilization+1.5
Clinical signs of deep vein thrombosis+3
Alternative diagnosis less likely than pulmonary embolism+3