Fig. 2.

Receiver operator characteristic curves for diagnosis of pancreatic adenocarcinoma versus non-cancer cases. Curves demonstrate the relative accuracy for the individual serum haptoglobin or SAA levels to discriminate between PA and control cases. Serum levels of healthy control subjects (N = 150), patients with chronic pancreatitis (N = 32), and patients with benign neoplasm or other periampullary lesions (N = 42) were considered true negative cases, whereas serum levels of pretreatment samples from patients with cytologically confirmed pancreatic adenocarcinoma (N = 75) were considered true positive cases. AUC = area under curve.