Key result
In Japanese adults with normal glucose tolerance, 2-hour post-load plasma glucose was independently associated with increased carotid artery intima-media thickness (β = 0.09, P = 0.012).
Why the study?
Are 2-hour post-load plasma glucose levels associated with increased carotid intima-media thickness in subjects with normal glucose tolerance?
Cross-Sectional (n=663)
Are 2-hour post-load plasma glucose levels associated with increased carotid intima-media thickness in subjects with normal glucose tolerance?
Elevated 2-hour post-load plasma glucose levels, even within the normal range, are independently associated with increased carotid intima-media thickness, particularly in combination with hypertension.
Answers are grounded in this paper and cite their sources.
No practice change for normoglycemic adults; hypothesis-generating for post-load glucose as atherosclerosis marker.
AIMS: Elevated post-load plasma glucose levels may increase the risk of cardiovascular disease, even when they are within the normoglycaemic range. We examined the association of carotid artery intima-media thickness, a marker of early atherosclerosis, with glycaemic variables, including post-load plasma glucose levels, in Japanese subjects with normal glucose tolerance. METHODS: The study participants were 663 Japanese subjects with normal glucose tolerance (565 men, mean age 47 ± 9 years) who underwent both a 75-g oral glucose tolerance test and carotid artery intima-media thickness measurement by B-mode ultrasonography during a health examination. Associations between maximal common carotid artery intima-media thickness and fasting plasma glucose, 1-h and 2-h plasma glucose during an oral glucose tolerance test, and HbA1c were examined. RESULTS: The carotid artery intima-media thickness gradually increased across the tertiles of 1-h plasma glucose, 2-h plasma glucose and HbA1c . In multiple linear regression analysis, 2-h plasma glucose (β = 0.09, P = 0.012), as well as age, male gender, hypertension, dyslipidaemia, and current smoking were independent determinants of carotid artery intima-media thickness. In contrast, other glycaemic variables were not independent determinants of carotid artery intima-media thickness. The carotid artery intima-media thickness in hypertensive subjects with the highest tertile of 2-h plasma glucose [0.70 (95% CI 0.64-0.76) mm] was significantly greater than in normotensive subjects, with the lowest tertile of 2-h plasma glucose [0.60 (95% CI 0.58-0.63) mm, P = 0.037], even after adjusting for the multiple potential confounders. CONCLUSIONS: The 2-h plasma glucose during an oral glucose tolerance test was positively and independently associated with carotid artery intima-media thickness in Japanese subjects with normal glucose tolerance. In particular, the combination of elevated 2-h plasma glucose and hypertension may contribute to an increased carotid artery intima-media thickness.
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Kato et al. (2013) conducted a cross-sectional in Normal glucose tolerance (n=663). 2-hour post-load plasma glucose vs. Lowest tertile of 2-hour plasma glucose was evaluated on Carotid artery intima-media thickness (β = 0.09, p=0.012). In Japanese adults with normal glucose tolerance, 2-hour post-load plasma glucose was independently associated with increased carotid artery intima-media thickness (β = 0.09, P = 0.012).
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