Related Experiment Video
Updated: Feb 27, 2026

Characterization of Metabolic Status in Nonhuman Primates with the Intravenous Glucose Tolerance Test
Published on: November 13, 2016
Time to glucose peak during an oral glucose tolerance test identifies prediabetes risk
Stephanie T Chung1, Joon Ha2, Anthony U Onuzuruike1
1Section on Ethnicity and Health, Diabetes Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), National Institutes of Health (NIH), Bethesda, MD, USA.
Context:
Morphological characteristics of the glucose curve during an oral glucose tolerance test (OGTT) (time to peak and shape) may reflect different phenotypes of insulin secretion and action, but their ability to predict diabetes risk is uncertain.
Objective:
To compare the ability of time to glucose peak and curve shape to detect prediabetes and β-cell function.
Design And Participants:
In a cross-sectional evaluation using an OGTT, 145 adults without diabetes (age 42±9 years (mean±SD), range 24-62 years, BMI 29.2±5.3 kg/m2 , range 19.9-45.2 kg/m2 ) were characterized by peak (30 minutes vs >30 minutes) and shape (biphasic vs monophasic).
Main Outcome Measures:
Prediabetes and disposition index (DI)-a marker of β-cell function.
Results:
Prediabetes was diagnosed in 36% (52/145) of participants. Peak>30 minutes, not monophasic curve, was associated with increased odds of prediabetes (OR: 4.0 vs 1.1; P<.001). Both monophasic curve and peak>30 minutes were associated with lower DI (P≤.01). Time to glucose peak and glucose area under the curves (AUC) were independent predictors of DI (adjR2 =0.45, P<.001).
Conclusion:
Glucose peak >30 minutes was a stronger independent indicator of prediabetes and β-cell function than the monophasic curve. Time to glucose peak may be an important tool that could enhance prediabetes risk stratification.
More Related Videos
08:13Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test OGTT and Insulin Tolerance Test ITT
Published on: January 7, 2018
06:13Author Spotlight: Exploring the Impact of Reduced Resistance Exercise Volume on Metabolic Health
Published on: December 1, 2023
Related Concept Videos
Diabetes: Symptoms, Diagnosis, and Complications
Oral Hypoglycemic Agents: Glinides
Diabetes Mellitus: Type 2 and Gestational
Hypoglycemia and Glucagon
Oral Hypoglycemic Agents: Biguanides and Glitazones
Glucose Homeostasis: Regulation of Blood Glucose
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...