Fasting plasma glucose variability in midlife and risk of Parkinson's disease: A nationwide population-based study

H. S. Chung, J. S. Lee, J. A. Kim, E. Roh, Y. B. Lee, S. H. Hong, Ji Hee Yu, Nan Hee Kim, H. J. Yoo, Ji A Seo, Sin Gon Kim, Sei-Hyun Baik, Kyung Mook Choi

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12 Citations (Scopus)


Aim: Despite the recognized association between type 2 diabetes (T2D) and Parkinson's disease (PD), the implications of glycaemic variability for patients with PD are as yet unknown. For this reason, our study assessed the future risk of incident PD according to visit-to-visit fasting plasma glucose (FPG) variability, as calculated by standard deviation (FPG-SD), coefficient variance (FPG-CV) and variability independent of the mean (FPG-VIM). Methods: Using the Korean National Health Insurance Service Health Screening Cohort, 131,625 Korean adults without diabetes were followed. They were divided into a midlife group (age < 65 years) and an elderly group (age ≥ 65 years) throughout a median follow-up of 8.4 years. Results: Adjusted hazard ratios (HRs) were calculated using multivariable Cox proportional-hazards analysis. In the midlife group, HRs for incident PD in the highest quartile of FPG variability (as measured by SD, CV and VIM) were 1.37 [95% confidence interval (CI): 1.09–1.73], 1.33 (95% CI: 1.06–1.68) and 1.35 (95% CI: 1.07–1.70), respectively, vs the lowest variability quartile group. However, while incident PD did not differ according to FPG variability in the elderly group, Kaplan–Meier curves of PD probability in the midlife group showed a progressively increasing risk of PD the higher the FPG variability. According to a multivariable adjusted model, every 1-SD unit increment in glycaemic variability was associated with a 9% higher risk of incident PD in the midlife group. Conclusion: Increased long-term glycaemic variability may be a precipitating risk factor for developing PD in the midlife population without diabetes.

Original languageEnglish
Article number101195
JournalDiabetes and Metabolism
Issue number3
Publication statusPublished - 2021 May

Bibliographical note

Funding Information:
This study was supported in part by the Korea University Research Fund ( K2020461 ; K.M.C.) and the National Research Foundation of Korea ( NRF-2018R1D1A1B07049605 ; H.S.C.).

Publisher Copyright:
© 2020 Elsevier Masson SAS


  • Fasting plasma glucose
  • Glycaemic variability
  • Midlife
  • Parkinson's disease
  • Visit-to-visit

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology


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