Compression of the Inferior Vena Cava in Bowel Obstruction

Figure 5

ROC curve of the ratio between anteroposterior and lateral caval diameters 1 cm above the iliac vein confluence for differentiating patients with abdominal obstruction from controls. Ten steps of ratio from 0.10 to 1.00. Cut-off value = 0.63; this value was associated with 74% sensitivity and 96% specificity.