Table 1.

Proportion of patients with low, moderate, and high Wells criteria scores for clinical probability of pulmonary embolism on the basis of D-dimer levels

D-dimer level	Wells criteria
Low (<2)	Moderate (2–6)	High (>6)	Total
<0.4 µg/mL	34	20	3	57
0.4–1.0 µg/mL	194	89	7	290
Total	228	109	10	347