The Effects of Insulin Therapy on Mothers’ Blood Pressure and Weight in Women with Gestational Diabetes Mellitus
Abstract BackgroundThe primary mechanism of gestational diabetes mellitus (GDM) was insulin resistance. Effects of insulin as the first - line medicine for GDM women was blurring. This work aims to investigate influences of insulin therapy on GDM mothers. MethodsThis retrospective cohort study recruited 616 GDM women with lifestyle intervention (diet and physician alone) and 92 GDM women with insulin therapy. Comparing the differences of variables (BMI, blood pressure, gestational weight gain, the incidence of macrosomia and so on) between GDM women with insulin and with lifestyle alone with univariate analysis. Employed paired sample test to evaluate the changes of BP from the time of intervention to one week before delivery, and used logistic regression to analyze the relationship between insulin therapy and gestational hypertension (GH).ResultsThere were no significant differences in delivery mode, newborn weight and the incidence of macrosomia between GDM women with insulin and with lifestyle alone. Insulin therapy slightly increased mothers’ weight despite there were no significant statistically differences in the rate of excessive weight gain comparing to the intervention of lifestyle alone which was attributed to short - term administration (about 12 weeks). In addition, the injection of insulin remarkably enhanced the incidence of gestational hypertension (GH). furthermore, the effect still existed after matching the time of insulin therapy, and from starting insulin usage to delivery systolic blood pressure significantly elevated 6mmHg (vs 4mmHg lifestyle alone, P = 0.529) and diastolic blood pressure 9mmHg (vs 5mmHg lifestyle alone, P = 0.032). Correlation analysis implied blood pressure near the delivery had significant positive correlation with BMI, 1 hour blood glucose, HbA1c, area under the blood glucose curve and gestational weight gain. Logistic regression analysis with enter selection confirmed that insulin therapy was an independent risk factor for the development of GH.ConclusionsThis work suggested that insulin therapy for short - term usage might slightly increase mothers’ weight, but had the marked risk of raising mothers’ BP, especially DBP.