['We investigated the association between the ratio of serum glycated albumin (GA) levels to hyperglycemic levels (GA/A1c ratio) and the progression of carotid artery atherosclerosis.', 'For this retrospective longitudinal study we recruited patients who had undergone carotid IMT measurement twice and been tested consecutively for both A1c and GA levels every 3 or 6 months. The subjects were classified into two groups based on non-progression (group I) and progression (group II) of carotid IMT. Mean values of A1c and GA and the GA/A1c ratio were compared between groups.', "Of the 218 subjects (122 men and 96 women), group II (n=77) showed significantly higher baseline systolic BP, eGFR, GA, GA/A1c ratio, and progression of carotid IMT (Δ IMT) than group I (n = 141). The mean A1c level tended to be higher in group II than in group I (p = 0.054). By Spearman's correlation test, baseline diastolic BP, total cholesterol, triglyceride, GA, and GA/A1c were significantly associated with Δ IMT in group II but not in group I. In multivariate regression analysis, serum level of GA and GA/HbA1c ratio predicted progression of IMT after adjustment for other risk factors in both models applied."] Does serum glycated albumin predict the progression of carotid arterial atherosclerosis?