Previous studies have shown that glucose fluctuation is closely related to oxidative stress and diabetic complications. However, only few studies have evaluated the influencing factors of glycemic variability (GV) in type 2 diabetes (T2D) patients so far.
This was a cross-sectional study design. A total of 366 cases of hospitalized patients with T2D using insulin therapy, whom received continuous glucose monitoring from January 2014 to December 2016, were enrolled for this study. The evaluation variables of GV included standard deviation of blood glucose, coefficient of variation (CV%), mean amplitude of glycemic excursion, and absolute means of daily differences.
In 366 T2D patients with insulin therapy, 148 were used multiple daily injections (MDI) insulin regimen; 144 were on premixed insulin injection; and 74 were treated with continuous subcutaneous insulin injection. Compared with MDI insulin regimen, patients on premixed insulin injection have less insulin dose per day, lower mean blood glucose, and better glycated hemoglobin (HbA1c) (all P <.05). Generalized linear model showed that family history of diabetes, duration of diabetes, higher HbA1c, and higher level of aspartate aminotransferase and high-density lipoprotein cholesterol were positively associated with GV parameters. Otherwise, serum levels of C-peptide, premixed insulin injection, history of cardiovascular disease, and serum concentration of uric acid were inversely associated with GV parameters.
Dysfunction of pancreatic β-cell and better insulin sensitivity were independent contributors to the fluctuation of blood glucose. Moreover, premixed insulin therapy may obtain better glucose control and lower within-day and day-to-day glucose variability for Chinese T2D patients with insulin therapy.