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Long-range correlated glucose fluctuations in diabetes
H Ogata1, K Tokuyama, S Nagasaka
1Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan.
Methods of Information in Medicine
|March 10, 2007
Summary
Diabetic patients exhibit long-range positive correlations in blood glucose levels, unlike non-diabetics. This detrended fluctuation analysis (DFA) finding suggests impaired glucose regulation in diabetes.
Area of Science:
- Endocrinology and Metabolism
- Biomedical Engineering
- Time Series Analysis
Background:
- Diabetes mellitus is characterized by impaired glucose homeostasis.
- Understanding diurnal glucose fluctuations is crucial for managing diabetes.
- Traditional methods may not fully capture complex glucose dynamics.
Purpose of the Study:
- To investigate diabetes-related alterations in diurnal glucose control using detrended fluctuation analysis (DFA).
- To analyze glucose fluctuations in daily life for both diabetic and non-diabetic individuals.
Main Methods:
- Continuous glucose monitoring (CGM) data collected over one day from 12 non-diabetic subjects and 15 diabetic patients.
- Application of DFA to analyze long-range correlations in glucose time series.
- Calculation of the DFA exponent (alpha) to characterize correlation patterns.
Main Results:
- Diabetic patients showed significantly higher mean glucose levels and standard deviation compared to non-diabetic subjects.
- Non-diabetic subjects exhibited a crossover phenomenon with negatively correlated glucose fluctuations in the long-range regime (>2 hours).
- Diabetic patients displayed positively correlated glucose fluctuations (DFA exponent alpha = 1.65 +/- 0.30) in the long-range regime, indicating persistent effects.
Conclusions:
- Long-range positive correlations in glucose homeostasis may indicate pathogenic mechanisms in diabetes, reflecting a lack of tight glucose control.
- DFA provides a novel approach for continuous evaluation of glucose dynamics.
- Advanced time series analysis can improve diabetes diagnosis, prognosis, and understanding of glucose dysregulation.
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