REG1A and type 2 diabetes mellitus: Spearman's correlation analysis indicated that serum PSP/REG Iα levels were negatively correlated with eGFR (r = −0.519, P < 0.001) and positively associated with SCr (r = 0.440, P < 0.001), BUN (r = 0.348, P = 0.003), age (r = 0.259, P = 0.031), and UA (r = 0.314, P = 0.009) in patients with T2DM.