Accuracy of Real-Time Continuous Glucose Monitoring System in Hospitalized Patients with Diabetes and Chronic Kidney Disease
Authors' conclusion
The Dexcom G6 demonstrated reliable accuracy in hospitalized patients with diabetes and CKD, with better performance in advanced CKD.
Study context
- Population
- Hospitalized patients with diabetes and chronic kidney disease (CKD); excluded acute kidney injury, active glomerulonephritis, intensive care or hemodialysis1,603 paired values
- Participants
- 52 patients
- Exposure
- Real-time continuous glucose monitoring (CGM) vs capillary point-of-care (POC) glucose, by estimated glomerular filtration rate (eGFR) category
- Outcome
- Accuracy of real-time CGM vs POC capillary glucose (MARD, correlation, Bland-Altman, consensus error grid)
Methodological detailsdiagnostic accuracy, paired CGM vs capillary POC glucose
- Diagnostic accuracy
- Paired CGM vs capillary POC glucose
Main finding
As reported in the abstract
MARD
| Group | Value | Paired values |
|---|---|---|
| G1-2 | 19.4% | 752 |
| G3 | 15.5% | 571 |
| G4-5 | 13.5% | 280 |
Value
G1-219.4%
G315.5%
G4-513.5%
Paired values
G1-2752
G3571
G4-5280
- G1-2 vs G3: P < 0.001 — across the three eGFR groups
- Overall mean absolute relative difference (MARD)
- 17.0%
- CGM vs POC glucose correlation
- r = 0.91, P < 0.001
Observational data: associations, not effects.
Further findings
Bland-Altman agreement
- Smaller bias and narrower limits of agreement in advanced CKD
Consensus error grid
- Values within clinically acceptable zones
- >99%
Original publication
Accuracy of Real-Time Continuous Glucose Monitoring System in Hospitalized Patients with Diabetes and Chronic Kidney Disease. Diabetes Technol Ther. Published 16 February 2026. doi:10.
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