Resistance to Data Loss of Glycemic Variability Measurements in Long-Term Continuous Glucose Monitoring.

Abstract:

: Background: Continuous glucose monitoring (CGM) is a method of estimating blood glucose values from those recorded in the interstitial fluid. Because increasingly longer CGM measurements are possible, errors and data loss become more and more likely and potentially more damaging to accurate calculations of glycemic variability (GV) indices. Our research investigates the resistance of the CGM recording to data loss. Methods: We collected 71 CGM recordings (duration of min: 2, max: 265, median: 42 days) from patients with type 1 diabetes and used three algorithms to introduce missing data. We calculated mean and standard deviation (SD) of absolute percentage error of 12 variability indices and correlated those with the percentage of missing data and duration of the measurements. Results: Mean absolute percentage error of variability indices increased linearly with the percentage of missing data along with SD of absolute percentage error. Except for mean amplitude of glycemic excursions and time spent in hypoglycemia, all absolute errors never exceeded 25%, while mean absolute errors stayed below 5%. The gradient removal algorithm introduced errors larger than the single datapoint and block removal algorithms. The absolute percentage error of variability indices correlated negatively with the duration of the CGM measurements. Conclusions: Standard GV measurements in long-term glucose monitoring are robustly resistant to data loss.

journal_name

Diabetes Technol Ther

authors

Kucharski P,Pagacz K,Szadkowska A,Młynarski W,Romanowski A,Fendler W

doi

10.1089/dia.2018.0247

subject

Has Abstract

pub_date

2018-12-01 00:00:00

pages

833-842

issue

12

eissn

1520-9156

issn

1557-8593

journal_volume

20

pub_type

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