NPPB and autoimmune pancreatitis: NT-proBNP level with a cut-off at 303.5 pg/ml had a negative likelihood ratio (LR−) of 0.6 and a positive likelihood ratio (LR+) of 1.6 for the outcome of AIP (AUC = 0.632, 95% CI 0.516–0.747, p = 0.03).