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ROC curve of miR-30a expression of clinicopathological features. (A). ROC curve of tumor size. The area under curve (AUC) was 0.614 (95% CI: 0.514–0.713, P=0.029). (B). ROC curve of lymph node metastasis. The AUC was 0.681 (95% CI: 0.584–0.778, P=0.001). (C). ROC curve of TNM. The AUC was 0.674 (95% CI: 0.578–0.771, P=0.001).
