REG1A and type 1 diabetes mellitus: We found that PSP/reg1A levels were significantly higher in the type 1 diabetes mellitus population (median = 13.52 ng/ml, IQR = 10.91-19.01 ng/ml versus median = 10.72 ng/ml, IQR = 8.94-12.54 ng/ml, p = 0.0007, Figure 1).