Fig. 4

ROC curve analysis of the PFN2 IHC scores for detecting precancerous lesions and ESCC tissues. a ESCC tissues, b HGIN tissues, and c LGIN tissues of the Chinese Han population and d ESCC tissues of the Kazakh population from the controls. The area under the curve (AUC) is 0.893, 0.947, 0.743, and 0.860, respectively