Tonya D Riddlesworth1, Roy W Beck1, Robin L Gal1, Crystal G Connor1, Richard M Bergenstal2, Sooji Lee3, Steven M Willi3. 1. 1 Jaeb Center for Health Research , Tampa, Florida. 2. 2 International Diabetes Center Park Nicollett , Minneapolis, Minnesota. 3. 3 Children's Hospital of Philadelphia; Division of Endocrinology and Diabetes, Perelman School Medicine, University of Pennsylvania , Philadelphia, Pennsylvania.
Abstract
OBJECTIVE: To determine the minimum sample of continuous glucose monitoring (CGM) data needed to accurately reflect 3 months of glycemic control. RESEARCH DESIGN AND METHODS: Three months of CGM data were collected on 257 individuals (age 10-78 years) with type 1 diabetes in two studies (one using the Abbott FreeStyle Libre Pro™ and the other using the Dexcom™ G4). Correlations were calculated between the full 3 months and incremental sampling periods of CGM data. RESULTS: Correlation to the full 3 months of data improved with an increasing number of days of data collection, plateauing by about 14 days, with an R2 value of 0.84-0.86 for mean glucose, time at 70-180 mg/dL, and time >180 mg/dL, with lower values for time <70 mg/dL (0.76) and coefficient of variation (0.70). CONCLUSIONS: Fourteen days of CGM data provide a good estimation of glucose metrics for a 3-month period.
OBJECTIVE: To determine the minimum sample of continuous glucose monitoring (CGM) data needed to accurately reflect 3 months of glycemic control. RESEARCH DESIGN AND METHODS: Three months of CGM data were collected on 257 individuals (age 10-78 years) with type 1 diabetes in two studies (one using the Abbott FreeStyle Libre Pro™ and the other using the Dexcom™ G4). Correlations were calculated between the full 3 months and incremental sampling periods of CGM data. RESULTS: Correlation to the full 3 months of data improved with an increasing number of days of data collection, plateauing by about 14 days, with an R2 value of 0.84-0.86 for mean glucose, time at 70-180 mg/dL, and time >180 mg/dL, with lower values for time <70 mg/dL (0.76) and coefficient of variation (0.70). CONCLUSIONS: Fourteen days of CGM data provide a good estimation of glucose metrics for a 3-month period.
Entities:
Keywords:
Continuous glucose monitoring; Data sampling; Type 1 diabetes
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