Abstract
AimsIn this cross-sectional study, we explored the utility of corneal confocal microscopy (CCM) measures for detecting diabetic polyneuropathy (DPN) and their association with clinical variables, in a cohort with type 2 diabetes. MethodsCCM, nerve conduction studies, and assessment of symptoms and clinical deficits of DPN were undertaken in 144 participants with type 2 diabetes and 25 controls. DPN was defined according to the Toronto criteria for confirmed DPN. ResultsCorneal nerve fiber density (CNFD) was lower both in participants with confirmed DPN (n = 27) and in participants without confirmed DPN (n = 117) compared with controls (P = 0.04 and P = 0.01, respectively). No differences were observed for CNFD (P = 0.98) between participants with and without DPN. There were no differences in CNFL and CNBD between groups (P = 0.06 and P = 0.29, respectively). CNFD was associated with age, height, total- and LDL cholesterol. ConclusionsCCM could not distinguish patients with and without neuropathy, but CNFD was lower in patients with type 2 diabetes compared to controls. Age may influence the level of CCM measures.
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