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Association between HbA1c and carotid atherosclerosis among elderly Koreans with normal fasting glucose.

Association between HbA1c and carotid atherosclerosis among elderly Koreans with normal fasting glucose.
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Lee SW, Kim HC, Lee YH, Song BM, Choi H, Park JH, Rhee Y, Kim CO,


Lee SW, Kim HC, Lee YH, Song BM, Choi H, Park JH, Rhee Y, Kim CO, (click to view)

Lee SW, Kim HC, Lee YH, Song BM, Choi H, Park JH, Rhee Y, Kim CO,

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PloS one 2017 02 0812(2) e0171761 doi 10.1371/journal.pone.0171761
Abstract
AIM
We examined whether glycated haemoglobin (HbA1c) is associated to carotid atherosclerosis in an elderly Korean population with normal fasting glucose.

METHODS
Using data from the Korean Urban Rural Elderly study, we conducted a cross-sectional analysis of 1,133 participants (335 men and 798 women) with a mean age of 71.8 years. All participants had fasting blood glucose less than 100mg/dL (5.6 mmol/L) and HbA1c level below 6.5% (48 mmol/mol). They were also free from a history of cardiovascular disease, known type 2 diabetes mellitus or use of anti-diabetes medications. Carotid atherosclerosis was assessed by intima-media thickness (IMT) using ultrasonography. The association between HbA1c and carotid IMT was investigated using multivariable linear regression analysis.

RESULTS
HbA1c levels were independently and positively associated with carotid IMT (β = 0.020, p = 0.045) after adjusting for sex, age, body mass index, systolic blood pressure, diastolic blood pressure, triglyceride, LDL cholesterol, smoking and alcohol intake. However, fasting insulin and glucose levels were not associated with carotid IMT.

CONCLUSION
HbA1c levels were positively associated with carotid atherosclerosis, as assessed by carotid IMT, in an elderly population with normoglycemia. Our study suggested that higher HbA1c level is an effective and informative marker of carotid atherosclerosis in an elderly population.

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