Shekarchian et al reported a score for identifying a patient with a deep vein thrombosis in ileofemoral vessels. These can help to identify a patient who may benefit from more aggressive management. The authors are from Maastricht University, University of Southern California, Primary Care Rotterdam, and St. Joseph's Hospital Heart and Vascular Center (Los Angeles).
Patient selection: suspected deep vein thrombosis in a lower extremity
Parameters:
(1) plasma D-dimer µg/L FEU
(2) age in years
(3) Wells score, from -2 to 8
(4) therapy with anticoagulants
Parameter
Finding
Points
D-dimer
2.77 * (LOG10 (D-dimer))
age
0.02 * (age)
Wells score
0.55 * (Wells score)
anticoagulation therapy
no
0
yes
-0.85
value of X =
= SUM(beta-coefficients for all of the parameters) - 14.53
probability of deep vein thrombosis =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.90.
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