APOA2 and pancreatic neoplasm: The AUC values for CA19-9 and apoA2-ATQ/AT isoform as single biomarkers to distinguish patients with early stage pancreatic cancer (stage I/II) were 0.783 (95% CI 0.64, 0.95, 0.699–0.855), and 0.809 (95% CI, 0.748–0.867), respectively.