Receiver Operating Characteristic (ROC) curves for distinguishing VTE patients from non-VTE patients plus healthy controls. The comparative ROC curves for all the three integrins (left) and the combination of integrins (right) are provided. The area under the curve (AUC) of integrin β, integrin β2 and integrin β3 was 0.870 (P=0.000, 95% CI: 0.825-0.915), 0.821 (P=0.000, 95% CI: 0.771-0.871) and 0.731 (P=0.000, 95% CI: 0.671-0.792), respectively, and that of combined three integrins was 0.916 (P=0.000, 95% CI: 0.878-0.953).