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Published on: June 11, 2012
Continuous Glucose Monitor Accuracy for Diabetes Management in Hospitalized Children
Neha Garg1, Kamryn Lewis1, Perrin C White1
1Division of Pediatric Endocrinology, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX.
Insights
Continuous glucose monitors (CGMs) are accurate for hospitalized children with diabetes. Integrating CGM data into electronic health records can improve patient management and care.
Area of Science:
- Pediatric Endocrinology
- Medical Device Technology
- Diabetes Management
Background:
- Continuous glucose monitors (CGMs) adoption in pediatric inpatient settings is limited due to insufficient data on their reliability.
- Assessing CGM accuracy in hospitalized children is crucial for clinical decision-making.
Purpose of the Study:
- To evaluate the accuracy and clinical reliability of the Dexcom G6 CGM system in pediatric patients admitted to a hospital.
- To provide data supporting the integration of CGMs into inpatient pediatric diabetes care.
Main Methods:
- Retrospective review of Dexcom G6 CGM data and point-of-care (POC) glucose values from pediatric patients (ages 2-18).
- Analysis included Mean Absolute Relative Difference (MARD) and Clarke Error Grid (CEG) analysis.
- Investigated the impact of serum pH, sodium, and blood urea nitrogen (BUN) on CGM accuracy.
Main Results:
- The Dexcom G6 system demonstrated a Mean Absolute Relative Difference (MARD) of 15.9% in 2,904 paired CGM and POC measurements.
- 96.6% of CGM values fell within clinically acceptable zones (A and B) on the Clarke Error Grid.
- CGM accuracy was not significantly impacted by serum pH, sodium, or BUN levels.
Conclusions:
- The Dexcom G6 CGM system shows acceptable accuracy for monitoring glucose levels in hospitalized children with diabetes.
- Integrating CGM data into electronic health records can enhance diabetes management for pediatric inpatients.
- Further adoption of CGMs in pediatric hospital settings is warranted based on demonstrated reliability.
Objective:
The adoption of continuous glucose monitors (CGMs) in inpatient settings in the pediatric population has been slow because of a scarcity of data on their reliability in hospitalized children.
Research Design And Methods:
We retrospectively reviewed the accuracy of the Dexcom G6 CGM system in pediatric patients with diabetes admitted to our academic children's hospital from March 2018 to September 2023. We cross-referenced the Dexcom Clarity database against an internal database of inpatient admissions to identify all children with CGM data admitted to the hospital. We recorded sensor glucose readings from Clarity and values for point-of-care (POC) glucose, blood urea nitrogen (BUN), and pH from the electronic medical record. CGM accuracy and clinical reliability were measured by mean absolute relative difference (MARD) and Clarke error grid (CEG) analyses.
Results:
There were 3,200 admissions of children with diabetes in this period, of which 277 (from 202 patients age 2-18 years) had associated CGM data. Paired CGM and POC measurements (n = 2,904) were compared, resulting in an MARD of 15.9%, with 96.6% of the values in zones A and B of the CEG analysis. Approximately 62% of paired values fell within a 15% or 15 mg/dL difference, whichever was larger (15%/15 mg/dL range), 74% within 20%/20, and 88% within 30%/30. Serum pH, sodium, and BUN had no impact on CGM values or absolute relative difference in linear regression analysis.
Conclusions:
CGMs demonstrated acceptable accuracy in hospitalized children with diabetes. CGM data should be integrated into hospital electronic records to optimize management.
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