Accuracy of continuous glucose monitors for inpatient diabetes management
Open accessAbstract
Introduction: In hospitalized patients, continuous glucose monitoring (CGM) may improve glycemic control, prevent hypoglycemic events, and reduce staff workload compared with point-of-care (POC) capillary glucose monitoring. Methods: To evaluate CGM accuracy and safety of use in the inpatient setting, two versions of CGM sensors were placed on 43 and 34 adult patients with diabetes admitted to non-intensive care unit (ICU) medical wards, respectively. CGM accuracy relative to POC and safety of use were measured by calculating mean absolute relative difference (MARD) and by Clarke Error Grid (CEG) analysis. Results: CGM version 2 had improved accuracy compared with CGM version 1 with MARD 17.7 compared with 21.4%. CGM accuracy did not change with POC value or with time of sensor wear. On CEG, 98.8% of paired values fell within acceptable zones A and B. Conclusion: Despite reduced accuracy compared with the outpatient setting, both versions of CGMs had acceptable safety profiles in the inpatient setting.
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Studies assessing effectiveness of inpatient CGM may ultimately lead to approved use of CGM for monitoring hospitalized individuals.
“Studies have been published assessing the effectiveness of this approach, which may ultimately lead to the approved use of CGM for monitoring hospitalized individuals (277,286-295).”
From 7. Diabetes Technology: Standards of Care in Diabetes—2025 (2025) · cites this paper as [292]
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- Authors
- Wright, J. J., Williams, A. J., Friedman, S. B., Weaver, R. G., Williams, J. M., Hodge, E., Fowler, M., & Bao, S.
- Affiliations
- Vanderbilt University Medical Center (US)
- Corresponding author
- Wright, Jordan J.
- Venue
- Journal of Diabetes Science and Technology
- Publisher
- SAGE Publications
- Published
- 2022-02-07
- Volume
- 17
- Issue
- 5
- Pages
- 1252-1255
- ISSN
- 1932-2968 (ISSN-L)
- PMC
- PMC10563548
- OpenAlex
- W4210915280
- Cited by
- 49
- References
- 8
- Citations by year
- 2026: 13 · 2025: 15 · 2024: 8 · 2023: 6 · 2022: 7
- FWCI
- 6.67
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Journal of Diabetes Science and Technology (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of Diabetes and Digestive and Kidney Diseases (DK20593, T32DK7061)
- Doris Duke Charitable Foundation
- Topics
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hyperglycemia and glycemic control in critically ill and hospitalized patients
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
- Keywords
- continuous glucose monitoring, CGM accuracy, inpatient diabetes management, hospitalized patients, glycemic control, hypoglycemia prevention, Clarke error grid, mean absolute relative difference, sensor safety, internal medicine ward
- MeSH terms
- Adult, Blood Glucose, Diabetes Mellitus, Humans, Hypoglycemic Agents, Inpatients, Blood Glucose Self-Monitoring
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