Fig. 1From: The incidence and risk factors of deep venous thrombosis in lower extremities following surgically treated femoral shaft fracture: a retrospective case-control studyThe ROC curve of three continuous variables with statistical significance cutoff values. The optimal predictive values of intraoperative blood loss, d-dimer, and age were 550 ml, 1.09 μg/ml, and 35 years, respectivelyBack to article page