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  • Title: Deleterious effects of increased body weight associated with intensive insulin therapy for type 1 diabetes: increased blood pressure and worsened lipid profile partially negate improvements in life expectancy.
    Author: Palmer AJ, Roze S, Valentine WJ, Minshall ME, Lammert M, Nicklasson L, Spinas GA.
    Journal: Curr Med Res Opin; 2004 Aug; 20 Suppl 1():S67-73. PubMed ID: 15324518.
    Abstract:
    OBJECTIVE: Weight gain is an unwanted side effect of improved glycaemic control in type 1 diabetes, associated with increased blood pressure (BP) and worsening lipid profiles. While improved glycaemic control per se should improve long-term patient outcomes, increases in BP and worsening lipid profiles may counteract these benefits. The aim of this modelling study was to assess whether the increased body weight and associated worsening of lipid profile and blood pressure would negate the improvements in glycaemic control seen with intensive therapy in patients with type 1 diabetes. METHODS: A validated diabetes model projected life expectancy (LE), quality-adjusted LE (QALE) and total lifetime costs of complications in type 1 diabetes cohorts with the characteristics of patients from the Diabetes Control and Complications Trial (DCCT). The following four cohorts (A-D) were created based on increased body weight under either conventional or intensive therapy: A) conventional glycaemic control in the subgroup with lowest weight-gain quartile after 6.5 years (HbA1c increased by 11% from baseline); B) conventional control in the highest weight-gain quartile (no change in HbA1c from baseline); C) intensive control in the lowest quartile of weight gain (with 16.1% decrease in HbA1c, but no increase in weight or associated BP, and improved lipid profile); D) intensive control in the highest quartile of weight gain (with 21% decrease in HbA1c, increased systolic BP of 6 mmHg, and worsened lipid profile). Data were derived from DCCT and other published sources. RESULTS: Intensive control, even with weight gain, led to major improvements in LE and QALE, and reduction in costs of complications versus conventional therapy. Intensive therapy with no weight increase led to a higher LE (increased by 0.57 years) and higher QALE (increased by 0.28 years) and lower costs of complications (reduced by 523 dollars/patient), compared to intensive therapy with the highest quartile of weight gain. CONCLUSIONS: Concerns about weight gain should not deter intensive insulin therapy. However, the value of improving glycaemic control without increasing body weight (and associated increased BP and worsening of lipid profile) has been confirmed.
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