Figure 1.
Correlation of clinical staging with nerve conduction data of 158 patients with type 2 diabetes at baseline. At the beginning of the first year, clinical staging of neuropathy was determined based on the criteria proposed by the Japanese Study Group of diabetic polyneuropathy. Because of the small number of patients, stage IV and V were mixed together. Stage I, no neuropathy; stage II, asymptomatic neuropathy; stage III, early symptomatic neuropathy; stage IV, established symptomatic neuropathy; stage V, advanced symptomatic neuropathy. P‐values were evaluated by Spearman's rank sum test. CMAP, compound muscle action potential; MNCV, motor nerve conduction velocity.