Endocrinol Metab.  2020 Jun;35(2):319-328. 10.3803/EnM.2020.35.2.319.

Relationships between Thigh and Waist Circumference, Hemoglobin Glycation Index, and Carotid Plaque in Patients with Type 2 Diabetes

• Yoon MK
• Kang JG
• Lee SJ
• Ihm SH
• Huh KB
• Kim CS

• KMID: 2503262
• DOI: http://doi.org/10.3803/EnM.2020.35.2.319

Abstract

Background
This study investigated the relationships of thigh and waist circumference with the hemoglobin glycation index (HGI) and carotid atherosclerosis in patients with type 2 diabetes.
Methods
This observational study included 3,075 Korean patients with type 2 diabetes, in whom anthropometric measurements and carotid ultrasonography were conducted. HGI was defined as the measured hemoglobin A1c (HbA1c) level minus the predicted HbA1c level, which was calculated using the linear relationship between HbA1c and fasting plasma glucose levels. Carotid atherosclerosis was defined as a clearly isolated focal plaque or focal wall thickening >50% of the surrounding intima-media thickness.
Results
The frequency of a positive HGI decreased with increasing thigh circumference in men and increased with increasing waist circumference in women after adjusting for potential confounding variables. Thigh and waist circumference had a combined augmentative effect on the likelihood of positive HGI, which was dramatically higher in patients in higher waist-to-thigh ratio quartiles (adjusted odds ratios for the highest compared to the lowest quartile: 1.595 in men and 1.570 in women). Additionally, the larger the thigh circumference, the lower the risk of carotid atherosclerosis, although in women, this relationship lacked significance after adjustment for potential confounders.
Conclusion
HGI was associated with thigh circumference in men and waist circumference in women. In addition, the combination of low thigh circumference and high waist circumference was strongly associated with a higher HGI in Korean patients with type 2 diabetes. In particular, thigh circumference was associated with carotid atherosclerosis in men. However, further longitudinal studies are warranted.

Keyword

Diabetes mellitus, type 2; Thigh; Waist circumference; Glycated hemoglobin A; Carotid stenosis

Figure

• 

  Fig. 1 Odds ratio of positive hemoglobin glycation index (HGI) according to quartile (Q) of waist-to-thigh circumference ratio in (A) men and (B) women. aP<0.05 vs. Q1; bP<0.01 vs. Q1.

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