Development and Progression of Polyneuropathy Over 5 Years in Patients With Type 2 Diabetes
Peter Kolind Brask‐Thomsen, Mustapha Itani, Páll Karlsson, Alexander Gramm Kristensen, Thomas Krøigård, Troels S. Jensen, Hatice Tankişi, Søren H. Sindrup, Nanna Brix Finnerup, Sandra Sif Gylfadottir
Abstract
BACKGROUND AND OBJECTIVES: There is a need for knowledge regarding the natural course of diabetic polyneuropathy (DPN), a complication in type 2 diabetes (T2D). The aim of this study was to examine the development of DPN over time. METHODS: Patients with newly diagnosed T2D, recruited from a national cohort, and controls without diabetes of similar age and sex, underwent sensory phenotyping in 2016-2018. The Toronto consensus criteria were used to classify patients into possible, probable, and confirmed DPN. For this 5-year, observational, follow-up, cohort study, all participants were invited to a reexamination combining bedside sensory examination, quantitative sensory testing (QST), nerve conduction studies (NCSs), and skin biopsies measuring intraepidermal nerve fiber density (IENFD) in order to compare phenotypic and diagnostic changes over time. RESULTS: -scores at follow-up, and worsening of nerve parameters at follow-up correlated with higher baseline triglycerides. DISCUSSION: In patients with well-regulated T2D, the proportion of patients with confirmed DPN increased over 5 years driven by progression from probable DPN. A large proportion of patients progressed, and a smaller proportion regressed on nerve parameters. Higher triglycerides correlated with this progression and may constitute a risk factor.