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Diagnostic performance of the new model in the training set and validation set. The AUC was 0.992 in the training set and 0.993 in the validation set. Comparing CA19-9, CEA, and the combination of CA19-9 and CEA, the AUC of the new model was 0.993 in the validation set, and the AUC of CEA+ CA19-9 was 0.960 and CA19-9 alone was 0.960.
