Clinical accuracy of Dexcom G6 and G7 continuous glucose monitors in hospitalized pediatric patients with type 1 diabetes: a real-world study
Abstract
PURPOSE: Continuous glucose monitoring (CGM) is increasingly being used in inpatient pediatric diabetes care; however, data on its real-world accuracy remain limited. METHODS: We retrospectively assessed the clinical accuracy of factory-calibrated Dexcom G6 and G7 CGM systems in 69 pediatric patients with type 1 diabetes at a Korean tertiary hospital between 2019 and 2025. A total of 1,838 CGM readings were temporally paired with point-of-care (POC) capillary glucose measurements. Accuracy was evaluated using the mean absolute relative difference (MARD), mean absolute difference (MAD), Bland-Altman analysis, and Clarke error grid classification. Subgroup analyses were performed according to wear day, glucose range, care setting, and CGM type. RESULTS: The overall MARD was 10.6%±10.1% and MAD was 15.4±16.2 mg/dL. Accuracy improved over time, with MARD declining from 13.8% (G6) and 11.0% (G7) on day 1 to
Fields of Study & Subjects
Diabetes Management and Research
Hyperglycemia and glycemic control in critically ill and hospitalized patients
Diabetes and associated disorders
Publication details
- Journal / source
- Annals of Pediatric Endocrinology & Metabolism
- Publisher
- Korean Society of Pediatric Endocrinology
- Volume
- 31
- Issue
- 4
- Pages
- 220–229
- Publication date
- 1 April 2026
- Language
- EN