Cited by 179Pancreatic function and diabetesDiabetes, Cardiovascular Risks, and LipoproteinsDiabetes Management and Research

Two-Hour Seven-Sample Oral Glucose Tolerance Test and Meal Protocol

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Dalla Man, Chiara, Campioni, Marco, Polonsky, Kenneth S., Basu, Rita, Rizza, Robert A., Toffolo, Gianna, Cobelli, Claudio·2005·Diabetes

Abstract

Highly informative yet simple protocols to assess insulin secretion and action would considerably enhance the quality of epidemiological and large-scale clinical trials. In an effort to develop such protocols, a 5-h, 11-sample oral glucose tolerance test (OGTT) was performed in 100 individuals and a 7-h, 21-sample meal in another 100. Plasma glucose, insulin, and C-peptide concentrations were measured. We show that virtually the same minimal model assessment of β-cell responsivity (dynamic [Φd] and static [Φs]), insulin sensitivity (Si), and disposition index (DI) can be obtained with a reduced seven-sample 2-h protocol: Φd, reduced versus full: 871.50 vs. 873.32, r = 0.98 in OGTT and 494.88 vs. 477.99 10−9, r = 0.91 in meal; Φs: 42.36 vs. 44.35, r = 0.88 in OGTT and 35.31 vs. 35.37 10−9 min−1, r = 0.90 in meal; Si: 24.33 vs. 22.77 10−5 dl · kg−1 · min−1 per pmol/l, r = 0.89 in OGTT and 19.03 vs. 19.77 10−5 dl · kg−1 · min−1 per pmol/l, r = 0.85 in meal; and DI: 1,282.26 vs. 1,273.23, r = 0.84 in OGTT and 726.92 vs. 776.97 10−14 dl · kg−1 · min−2 per pmol/l, r = 0.84 in meal. This reduced protocol will facilitate the study of insulin secretion and action under physiological conditions in nondiabetic humans.

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Authors
Dalla Man, C., Campioni, M., Polonsky, K. S., Basu, R., Rizza, R. A., Toffolo, G., & Cobelli, C.
Affiliations
  • Department of Information Engineering, University of Padova, Padova, Italy
  • University of Padua (IT)
  • Washington University in St. Louis (US)
  • Mayo Clinic (US)
Venue
Diabetes
Published
2005-11-01
Volume
54
Issue
11
Pages
3265-3273
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2141363931
Cited by
179
References
12
Citations by year
2026: 8 · 2025: 6 · 2024: 9 · 2023: 6 · 2022: 8 · 2021: 14 · 2020: 10 · 2019: 8 · 2018: 16 · 2017: 8 · 2016: 9 · 2015: 6 · 2014: 8 · 2013: 9 · 2012: 8
FWCI
6.34
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK29953-23)
  • National Institute of Biomedical Imaging and Bioengineering (EB 01975, P41EB001975)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
Keywords
oral glucose tolerance test, insulin secretion, insulin sensitivity, insulin sensitivity index, disposition index, minimal model analysis, C-peptide, plasma glucose
MeSH terms
Insulin Secretion, Adult, Aged, 80 and over, Blood Glucose, C-Peptide, Diet, Glucose Tolerance Test, Humans, Insulin, Insulin Resistance, Middle Aged, Models, Biological, Time Factors, Insulin-Secreting Cells

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