Table 3a. The Wells score *.

Pulmonary embolism (PE) is most likely diagnosis	Yes = 3 points
Symptoms and signs of deep vein thrombosis (DVT) present	Yes = 3 points
Heart rate >100 beats/minute	Yes = 1.5 points
Immobilization for at least 3 days or surgery in previous 4 weeks	Yes = 1.5 points
Previous, objectively diagnosed DVT or PE	Yes = 1 point
Hemoptysis	Yes = 1 point
Malignancy with treatment within 6 months	Yes = 1 point

*In the validation cohort, a score of <4.0 (PE unlikely) combined with a negative Simpli-Red D-dimer assay (not an ELISA-based assay) accurately excluded a diagnosis of acute PE in 98% of patients. As per the first three-point item in the score, gestalt is part of the method; it is not entirely objective. Furthermore, it has been suggested that commonly, this subjective three-point “PE most likely” is what tips the score in favor of PE ³⁰.