Impaired olfactory function is related to the presence of neuropathy in adults with type 1 diabetes
Olfactory dysfunction is suggested to be a clinical manifestation of central diabetic neuropathy. The aim of the study was to assess olfactory function in adult patients with type 1 diabetes.Materials and methods:
A total of 106 patients with type 1 diabetes and 30 healthy subjects were included in the study. We evaluated the metabolic control of diabetes and the presence of chronic complications. Olfactory function was assessed with Sniffin’ Sticks.Results:
We found a negative correlation between olfactory identification scores and body mass index (Rs −0.2; p = 0.04) and triglycerides (Rs = −0.2; p = 0.04). We showed lower olfactory identification scores in neuropathy group versus non-neuropathy group [8 (interquartile range, 7–9) vs 10 (interquartile range, 9–11) points; p = 0.005]. In multivariate linear regression, impaired olfaction was independently associated with neuropathy (beta, −0.3; p = 0.005). In multivariate logistic regression, diabetes duration (odds ratio, 1.06; 95% confidence interval, 1.00–1.11; p = 0.04) and olfactory identification score (odds ratio, 0.61; 95% confidence interval, 0.43–0.85; p = 0.003) were independently associated with neuropathy.Conclusion:
Olfactory dysfunction is observed in patients with type 1 diabetes and diabetic peripheral neuropathy.