APOA2 and pancreatic neoplasm: The AUC of apoA2-ATQ/AT for distinguishing patients with pancreatic cancer from healthy individuals was 0.879 (95% CI 0.832–0.925), and the point estimate of AUC of apoA2-ATQ/AT was greater than 0.849 (95% CI 0.793–0.905) in CA19-9.