(a)
(b)
Figure 1: The level of genomic DNA methylation in different groups. (a) The level of genomic DNA methylation was lower in DPN (6~19 points) group compared with non-DPN (0~5 points) group (DPN, ; non-DPN, , , compared with non-DPN, Mann-Whitney test). (b) Dividing the population into 4 subgroups according to TCSS scores, the level of genomic DNA methylation went down as TCSS score increased (TCSS score: 0~5 points, ; 6~8 points, ; 9~11 points, ; 12~19 points, , , compared with non-DPN, Kruskal-Wallis ANOVA).