Cited by 898Diabetes, Cardiovascular Risks, and LipoproteinsPancreatic function and diabetesDiabetes Treatment and Management

Trajectories of glycaemia, insulin sensitivity, and insulin secretion before diagnosis of type 2 diabetes: an analysis from the Whitehall II study

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Tabák, Adam G, Jokela, Markus, Akbaraly, Tasnime N, Brunner, Eric J, Kivimäki, Mika, Witte, Daniel R·2009·The Lancet

Abstract

Background Little is known about the timing of changes in glucose metabolism before occurrence of type 2 diabetes. We aimed to characterise trajectories of fasting and postload glucose, insulin sensitivity, and insulin secretion in individuals who develop type 2 diabetes.Methods We analysed data from our prospective occupational cohort study (Whitehall II study) of 6538 (71% male and 91% white) British civil servants without diabetes mellitus at baseline. During a median follow-up period of 9.7 years, 505 diabetes cases were diagnosed (49.1% on the basis of oral glucose tolerance test). We assessed retrospective trajectories of fasting and 2-h postload glucose, homoeostasis model assessment (HOMA) insulin sensitivity, and HOMA beta-cell function from up to 13 years before diabetes diagnosis (diabetic group) or at the end of follow-up (non-diabetics).Findings Multilevel models adjusted for age, sex, and ethnic origin confirmed that all metabolic measures followed linear trends in the group of non-diabetics (10,989 measurements), except for insulin secretion that did not change during follow-up. In the diabetic group (801 measurements), a linear increase in fasting glucose was followed by a steep quadratic increase (from 5.79 mmol/L to 7.40 mmol/L) starting 3 years before diagnosis of diabetes. 2-h postload glucose showed a rapid increase starting 3 years before diagnosis (from 7.60 mmol/L to 11.90 mmol/L), and HOMA insulin sensitivity decreased steeply during the 5 years before diagnosis (to 86.7%). HOMA beta-cell function increased between years 4 and 3 before diagnosis (from 85.0% to 92.6%) and then decreased until diagnosis (to 62.4%).Interpretation In this study, we show changes in glucose concentrations, insulin sensitivity, and insulin secretion as much as 3-6 years before diagnosis of diabetes. The description of biomarker trajectories leading to diabetes diagnosis could contribute to more-accurate risk prediction models that use repeated measures available for patients through regular check-ups.Funding Medical Research Council (UK); Economic and Social Research Council (UK); British Heart Foundation (UK); Health and Safety Executive (UK); Department of Health (UK); National Institute of Health (USA); Agency for Health Care Policy Research (USA); the John D and Catherine T MacArthur Foundation (USA); and Academy of Finland (Finland).

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  • Control participants did not experience a change in insulin parameters during the study period.

    “Conversely, control participants did not experience a change in insulin parameters during the study period.”

    From Type 2 diabetes mellitus and psychological stress — a modifiable risk factor (2017) · cites this paper as [55]

    The Results section on HOMA β-cell function reports that calculated insulin secretion was flat in controls between 13 and 4 years before the end of follow-up. But the Results section on HOMA insulin sensitivity reports that controls’ insulin sensitivity decreased during part of the study period. The claim is therefore too broad in saying that control participants had no change in insulin parameters. (LLM, conf=0.88)

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  • Evidence from epidemiological studies with repeated measures of glucose and insulin parameters over many years suggests that the development of T2DM is a gradual process.

    “Evidence from epidemiological studies with repeated measures of glucose and insulin parameters over many years suggests that the development of T2DM is a gradual process 54, 55.”
  • Individuals who developed T2DM had lowered insulin sensitivity at baseline and showed a marked decrease in insulin sensitivity in the 5 years before onset of the disease.

    “Individuals who developed T2DM had lowered insulin sensitivity at baseline and showed a marked decrease in insulin sensitivity in the 5 years before onset of the disease.”
  • In control participants who did not develop T2DM, glucose parameters increased slightly over time (average fasting value of 5.26 mmol/l at baseline, increasing to 5.31 mmol/l at the end of follow-up) but no abrupt rises in concentrations were detected.

    “In the control participants who did not develop T2DM, glucose parameters increased slightly over time (average fasting value of 5.26 mmol/l at baseline, increasing to 5.31 mmol/l at the end of follow-up) but no abrupt rises in concentrations were detected.”
  • In incident T2DM cases, glucose values increased in a linear manner (average fasting value of 5.47 mmol/l at baseline) until 2-6 years before T2DM diagnosis, when abrupt elevations in glucose concentrations occurred (average fasting value ranging from 5.79 mmol/l 3 years before diagnosis to 7.40 mmol/l at the end of follow-up).

    “The glucose values of the incident T2DM cases increased in a linear manner (average fasting value of 5.47 mmol/l at baseline), until 2-6 years before T2DM diagnosis when abrupt elevations in glucose concentrations (average fasting value ranging from 5.79 mmol/l 3 years before diagnosis to 7.40 mmol/l at the end of follow-up) were observed.”

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Authors
Tabák, A. G., Jokela, M., Akbaraly, T. N., Brunner, E. J., Kivimäki, M., & Witte, D. R.
Affiliations
  • University of Helsinki (FI)
  • Inserm (FR)
  • University College London (GB)
Venue
The Lancet
Publisher
Elsevier BV
Published
2009-06
Volume
373
Issue
9682
Pages
2215-2221
ISSN
  • 0099-5355 (ISSN-L)
  • 0140-6736
OpenAlex
W2100271953
Cited by
898
References
45
Citations by year
2026: 52 · 2025: 44 · 2024: 57 · 2023: 63 · 2022: 60 · 2021: 66 · 2020: 53 · 2019: 49 · 2018: 52 · 2017: 53 · 2016: 62 · 2015: 52 · 2014: 52 · 2013: 56 · 2012: 50
FWCI
30.74
Type
journal article
Language
en
Open access
Locations
  • The Lancet (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Funders
  • John D. and Catherine T. MacArthur Foundation (HS06516)
  • National Institute for Health and Care Research
  • British Heart Foundation (HS06516, RG/07/008/23674)
  • Health and Safety Executive
  • Agency for Healthcare Research and Quality (HS06516)
  • Medical Research Council (HS06516)
  • Economic and Social Research Council
  • National Institute on Aging (AG 13196, R37AG013196, R01AG013196)
  • National Heart, Lung, and Blood Institute (HL36310, R01HL036310)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
type 2 diabetes, prediabetes, insulin sensitivity, insulin secretion, beta-cell function, fasting blood glucose, post-load glucose, HOMA, diabetes risk prediction, Whitehall II study, public sector employees, occupational cohort, oral glucose tolerance test, HOMA-IR
MeSH terms
Adult, Blood Glucose, Diabetes Mellitus, Type 2, Fasting, Female, Glucose Tolerance Test, Homeostasis, Humans, Insulin, Insulin Resistance, London, Male, Mass Screening, Middle Aged, Prediabetic State, Prospective Studies, Risk Factors, Time Factors, Biomarkers, Linear Models, Risk Assessment, Insulin-Secreting Cells

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