Signs and Evidence

Making clinical sense of scientific data


Beware of the limitations of this tool

Deep venous thrombosis (DVT)

Calculated pretest probability: 16 %
Relevant inclusion criteria: Outpatients with suspected deep-vein thrombosis 


1Malignant disease
2Recent immobilization
3Recent surgery

Clinical signs

4Difference in calf diameter

Sources used:

1.Goodacre S et al. Meta-analysis: the value of clinical assessment in the diagnosis of deep venous thrombosis. Ann Intern Med. 2005;143:129-39
2.Wells PS et al. Value of assessment of pretest probability of deep-vein thrombosis in clinical management. Lancet 1997 Dec 20-27 350(9094):1795-8