GSTM1 and type 2 diabetes mellitus: Similarly, moderate positive relationships were noted between creatinine and height (r = 0.73, p < 0.01), Hb (r = 0.54, p < 0.05), and Hct (r = 0.51, p < 0.01) in the T2DM seronegative group but not in the seropositive group.