Similarly, FABP-1 in the urine was higher in the group of AIP cases with high urine PBG (n = 28, median 2364 pg/mmol, IQR 1574–4263) compared with the group of AIP cases with low urine PBG (n = 20, median 1177 pg/mL, IQR 654–2926, p = 0.04, Figure 4). Here, FABP1 is linked to autoimmune pancreatitis.