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The effect of continuous glucose monitoring in well-controlled type 1 diabetes

, Roy W Beck, Irl B Hirsch

    Diabetes Care
    |May 12, 2009
    PubMed

    Insights

    Continuous glucose monitoring (CGM) benefits individuals with well-controlled type 1 diabetes. This study found CGM improved glycemic control and reduced time spent with high glucose levels in adults and children with type 1 diabetes.

    Area of Science:

    • Endocrinology
    • Metabolic Diseases
    • Diabetes Management

    Background:

    • Type 1 diabetes management requires precise glucose control.
    • Continuous glucose monitoring (CGM) offers real-time glucose data.
    • Benefits of CGM in well-controlled type 1 diabetes (A1C <7.0%) are not well-established.

    Purpose of the Study:

    • To evaluate the efficacy of CGM versus standard monitoring in adults and children with well-controlled type 1 diabetes.
    • To assess the impact of CGM on glycemic control, hypoglycemia, and A1C levels.

    Main Methods:

    • Randomized controlled trial involving 129 participants (age 8-69) with type 1 diabetes and A1C <7.0%.
    • Participants were assigned to either CGM or standard glucose monitoring for 26 weeks.
    • Primary outcomes included time in hypoglycemia (<70 mg/dl), A1C levels, and severe hypoglycemic events.

    Main Results:

    • Time out of range (glucose <70 or >180 mg/dl) was significantly lower with CGM (377 vs. 491 min/day, P=0.003).
    • Mean A1C levels at 26 weeks were significantly lower in the CGM group (P<0.001).
    • Combined outcome measures favored CGM, indicating improved overall glycemic management.

    Conclusions:

    • Continuous glucose monitoring demonstrates significant benefits for individuals with type 1 diabetes achieving excellent glycemic control (A1C <7.0%).
    • CGM use is associated with reduced time spent in hyperglycemia and improved A1C.
    • The findings support the use of CGM as a valuable tool for optimizing type 1 diabetes management in well-controlled patients.

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