The spectrum of neuropathy in diabetes and impaired glucose tolerance

To compare the neuropathy associated with impaired glucose tolerance (IGT) and diabetes mellitus (DM) determined by oral glucose tolerance testing (OGTT).

Patients with peripheral neuropathy of unknown cause were prescribed OGTT. Duration of neuropathic symptoms, neuropathic pain, neuropathy classification, nerve conduction test results, and intraepidermal nerve fiber densities (IENFD) were compared between IGT and DM groups.