Association of Whole Blood Viscosity With Metabolic Syndrome in Type 2 Diabetic Patients: Independent Association With Post-Breakfast Triglyceridemia

Satomi Minato, Akiko Takenouchi, Junko Uchida, Ayaka Tsuboi, Miki Kurata, Keisuke Fukuo, Tsutomu Kazumi


Background: Associations of whole blood viscosity (WBV) with metabolic syndrome (MS) have not been extensively studied in patients with type 2 diabetes.

Methods: Intrapersonal means of 12 measurements of waist circumference, blood pressure (BP) and high-density lipoprotein cholesterol and those of six measurements of fasting and post-breakfast triglycerides (TG) during 12 months were calculated in a cohort of 168 patients with type 2 diabetes. Based on these means, MS was diagnosed according to the modified National Cholesterol Education Program Adult Treatment Panel III criteria with the Asian definition of abdominal obesity. WBV was calculated from hematocrit and total serum protein concentrations by a validated formula.

Results: Diabetes patients with MS (n = 77) had higher WBV as compared to those without MS (6.38 0.06 vs. 6.10 0.07 cP, P = 0.004). As the number of MS components increased, WBV increased (component number 1: 6.12 0.10, 2: 6.09 0.10, 3: 6.37 0.08, 4: 6.42 0.10, 5: 6.30 0.15 cP, P for trends = 0.001). Multiple regression analysis revealed that male gender, diastolic BP and post-breakfast TG were determinants of WBV independent of fasting TG, body mass index (BMI) and waist circumference (R2 = 0.258).

Conclusions: Both the presence of MS and the number of MS components were associated with higher WBV in patients with type 2 diabetes. Physicians need to perform a close follow-up of type 2 diabetes patients with MS on inhibitors of sodium-glucose co-transporters 2, which may increase stroke risk associated with an increase in hematocrit and therefore blood viscosity. Post-breakfast TG was an independent determinant of WBV. Elevated WBV may represent an important confounder of the relationship between MS, postprandial hyperlipidemia and elevated cardiovascular risk in this population.

J Clin Med Res. 2017;9(4):332-338


Blood viscosity; Hematocrit; Postprandial TG; Metabolic syndrome; Type 2 diabetes

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