Cited by 168Diabetes Management and ResearchDiabetes Management and EducationDiabetes Treatment and Management

Clinical accuracy of a continuous glucose monitoring system with an advanced algorithm

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Bailey, Timothy S., Chang, Anna, Christiansen, Mark·2015·Journal of Diabetes Science and Technology

Abstract

Background: We assessed the performance of a modified Dexcom G4 Platinum system with an advanced algorithm, in comparison with frequent venous samples measured on a laboratory reference (YSI) during a clinic session and in comparison to self-monitored blood glucose (SMBG) during home use. Methods: Fifty-one subjects with diabetes were enrolled in a prospective multicenter study. Subjects wore 1 sensor for 7-day use and participated in one 12-hour in-clinic session on day 1, 4, or 7 to collect YSI reference venous glucose every 15 minutes and capillary SMBG test every 30 minutes. Carbohydrate consumption and insulin dosing and timing were manipulated to obtain data in low and high glucose ranges. Results: In comparison with the laboratory reference method (n = 2,263) the system provided a mean and median absolute relative differences (ARD) of 9.0% and 7.0%, respectively. The mean absolute difference for CGM was 6.4 mg/dL when the YSIs were within hypoglycemia ranges (≤ 70 mg/dL). The percentage in the clinically accurate Clarke error grid A zone was 92.4% and in the benign error B zone was 7.1%. Majority of the sensors (73%) had an aggregated MARD in reference to YSI ≤ 10%. The MARD of CGM-SMBG for home use was 11.3%. Conclusions: The study showed that the point and rate accuracy, clinical accuracy, reliability, and consistency over the duration of wear and across glycemic ranges were superior to current commercial real-time CGM systems. The performance of this CGM is reaching that of a self-monitoring blood glucose meter in real use environment.

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  1. [15]15. Brauker JH, Edelman SV. The function of continuous glucose sensors. Review of Endocrinology , 2007; May 20-22.

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Authors
Bailey, T. S., Chang, A., & Christiansen, M.
Affiliations
  • AMCR Institute (US)
  • John Muir Health (US)
  • Diablo Clinical Research (US)
Corresponding author
Bailey, Timothy S.
Venue
Journal of Diabetes Science and Technology
Published
2014-11-03
Volume
9
Issue
2
Pages
209-214
ISSN
1932-2968 (ISSN-L)
OpenAlex
W2165138941
Cited by
168
References
24
Citations by year
2026: 7 · 2025: 7 · 2024: 9 · 2023: 7 · 2022: 7 · 2021: 14 · 2020: 15 · 2019: 23 · 2018: 21 · 2017: 30 · 2016: 18 · 2015: 10
FWCI
15.54
Type
journal article
Language
en
Open access
Locations
  • Journal of Diabetes Science and Technology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Dexcom
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Education
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
continuous glucose monitoring, diabetes mellitus, clinical accuracy, hypoglycemia, self-monitoring of blood glucose, Clarke error grid, mean absolute relative difference, sensor reliability, insulin dose
MeSH terms
Adult, Aged, Aged, 80 and over, Algorithms, Blood Glucose, Diabetes Mellitus, Female, Humans, Male, Middle Aged, Blood Glucose Self-Monitoring, Young Adult

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