The most remarkable results we found were for age (p = 0.0001), duration of diabetes (p = 0.0006), height (p = 0.04), BMI (p = 0.05), creatinine (p = 0.04), microalbuminuria (p = 0.006), and the presence of insulin treatment (p = 0.02) which were statistically significant, associated with the presence of DSPN. Here, INS is linked to diabetes mellitus.