title: Correlation between baseline serum 1,5-anhydroglucitol levels and 2-hour post-challenge glucose levels during oral glucose tolerance tests.
abstract: Since there is increasing evidence that postprandial hyperglycemia is a risk factor for the development of macrovascular complications, it is important to predict postprandial hyperglycemia in the early stages of glucose intolerance, and routine medical checkups provide a good opportunity to do so. The aim of this study was to evaluate the usability of 1,5-anhydroglucitol (1,5-AG) in routine medical checkups. The subjects were 77 Japanese men who participated in a routine medical checkup. First, we performed 75 g oral glucose tolerance tests (OGTTs), and examined the changes in glucose and 1,5-AG levels measured at 0, 30, 60, 90, 120, and 180 minutes (min). 1,5-AG levels did not significantly change until 90 min after the glucose load. Second, a linear regression analysis showed an inverse correlation between the 2-hour post-challenge glucose (2h-PG) and baseline 1,5-AG levels during the OGTT (P = 0.001, r(2) = 0.13), and the correlation was still significant after adjustment for age (2h-PG = 170 + 0.83 × (age in years) - 3.23 × (1,5-AG), P = 0.002, adjusted r(2) = 0.12). Finally, to investigate the test characteristics of 1,5-AG levels as a predictor of a 2h-PG level ≥200 mg/dL, we plotted a receiver operating characteristic (ROC) curve. The area under the ROC curve was 0.78, and the maximal sum of sensitivity and specificity (78% and 72%, respectively) was obtained at a 1,5-AG cutoff level of <14.2µg/mL. We conclude that 1,5-AG values may provide an ancillary predictor of 2h-PG of 75 g OGTTs in routine medical checkups.
authors.affiliation: Department of Diabetes and Metabolic Medicine, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo, Japan.
authors.forename: Maki
authors.initials: M
authors.lastname: Goto
authors.forename: Ritsuko
authors.initials: R
authors.lastname: Yamamoto-Honda
authors.forename: Takuro
authors.initials: T
authors.lastname: Shimbo
authors.forename: Atsushi
authors.initials: A
authors.lastname: Goto
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Terauchi
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Kanazawa
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Noda
mesh_terms: D000328:Adult; D001786:Blood Glucose / Q000378:metabolism*; D003847:Deoxyglucose / Q000097:blood*; D005951:Glucose Tolerance Test / Q000379:methods*; D006801:Humans; D006943:Hyperglycemia / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D012372:ROC Curve; D012680:Sensitivity and Specificity
chemical_list: D001786:Blood Glucose; C006584:1,5-anhydroglucitol; D003847:Deoxyglucose