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Diabetologia

Erschienen in:

01.05.2010 | Article

Prospective association between fasting NEFA and type 2 diabetes: impact of post-load glucose

verfasst von: D. Il’yasova, F. Wang, R. B. D’Agostino Jr, A. Hanley, L. E. Wagenknecht

Erschienen in: Diabetologia | Ausgabe 5/2010

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Abstract

Aims/hypothesis

Elevated fasting NEFAs are thought to promote type 2 diabetes. Three prospective studies support this concept, showing increased diabetes risk associated with fasting NEFA. However, these prospective associations may be confounded by strong cross-sectional correlations between fasting NEFA and metabolic predictors of diabetes. To examine this assumption, we used cohort data from the Insulin Resistance Atherosclerosis Study (IRAS).

Methods

Within the IRAS cohort (n = 902, 145 incident cases), we examined nine metabolic variables for their confounding effect on the fasting NEFA–diabetes association: 2 h glucose; fasting plasma glucose; body mass index; waist circumference; waist-to-hip ratio; weight; insulin sensitivity (S _I); fasting insulin; and acute insulin response. We compared odds ratios for fasting NEFA (log_e transformed and adjusted for age, sex, ethnicity and clinic) before and after inclusion of each metabolic variable into a logistic regression model.

Results

Three variables (2 h glucose, BMI and S _I) cross-sectionally correlated with fasting NEFA (r ≥ 0.1, p < 0.05). Unadjusted for metabolic predictors, fasting NEFA levels were positively associated with diabetes risk: OR 1.37 (95% CI 0.87–2.15) per unit on a log scale. All metabolic variables except AIR showed confounding. Inclusion of 2 h glucose reversed the positive association (OR 0.50 [95% CI 0.30–0.82]), whereas other predictors reduced the association to the null. The final model included the variables correlated with baseline fasting NEFA (2 h glucose, BMI and S _I) and the demographic variables resulting in OR 0.47 (95% CI 0.27–0.81).

Conclusions/interpretation

Our results indicate that 2 h glucose strongly confounds the prospective association between fasting NEFA and diabetes; carefully adjusted fasting NEFA levels are inversely associated with diabetes risk.

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Titel: Prospective association between fasting NEFA and type 2 diabetes: impact of post-load glucose
verfasst von: D. Il’yasova
F. Wang
R. B. D’Agostino Jr
A. Hanley
L. E. Wagenknecht
Publikationsdatum: 01.05.2010
Verlag: Springer-Verlag
Erschienen in: Diabetologia / Ausgabe 5/2010
Print ISSN: 0012-186X
Elektronische ISSN: 1432-0428
DOI: https://doi.org/10.1007/s00125-010-1657-4

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