A negative d-dimer test result alone or combined with low risk clinical status effectively ruled out symptomatic DVT

d -dimer assay in the diagnosis of symptomatic deep venous thrombosis (DVT)

Patients	DVT	Sensitivity	Specificity	+LR	−LR
*LRs defined in glossary and calculated from data in article.
All	Proximal	100%	76%	4.2	0.0
All	Isolated calf	82%	69%	2.7	0.3
All	All	91%	82%	5.1	0.1
High risk	All	100%	47%	1.9	0.0
Moderate risk	All	75%	78%	3.4	0.3
Low risk	All	75%	90%	7.5	0.3

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