SOD2 and type 2 diabetes mellitus: Diabetes control expressed by glycated haemoglobin values was poorer in TT genotype (Val/Val) of SOD2 (7,10 ± 1,51; 95%CI: 6,42–7,91 in T1DM and 7,29 ± 1,49; 95%CI: 6,70–8,46 in T2DM) than in CC genotype (Ala/Ala) of SOD2 (6,39 ± 1,1; 95%CI: 5,7–7,0 in T1DM and 6,71 ± 1,21; 95%CI: 5,73–6,99 in T2DM), p < 0,05.