INS and diabetes mellitus: Overall, people with diabetic neuropathy had a mean age of 66.7 ± 7.6 years, a mean diabetes duration of 11.3 ± 6.7 years, and the mean HbA1c levels were 8.1 ± 1.5% (65 ± 7 mmol/mol); this documented a not well-compensated diabetes; in 43.8% of the cases, insulin was part of the treatment.