TTR and gestational diabetes: The GDM group had higher serum creatinine levels in the second trimester (GDM = 40.90 vs. control = 44.83, t = 2.402, P = 0.031) and plasma prealbumin levels in the third trimester (GDM = 235.52 vs. control = 262.93, t = 2.933, P = 0.005) than those of the control group.