Time in Range in Children with Type 1 Diabetes Using Treatment Strategies Based on Nonautomated Insulin Delivery Systems in the Real World

  • Valentino Cherubini
  • , Riccardo Bonfanti
  • , Alberto Casertano
  • , Elena De Nitto
  • , Antonio Iannilli
  • , Fortunato Lombardo
  • , Giulio Maltoni
  • , Marco Marigliano
  • , Marta Bassi
  • , Nicola Minuto
  • , Enza Mozzillo
  • , Ivana Rabbone
  • , Novella Rapini
  • , Andrea Rigamonti
  • , Giuseppina Salzano
  • , Andrea Scaramuzza
  • , Riccardo Schiaffini
  • , Davide Tinti
  • , Sonia Toni
  • , Luca Zagaroli
  • Stefano Zucchini, Claudio Maffeis, Rosaria Gesuita

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Glucose sensors consist of real-time continuous glucose monitoring (rtCGM) and intermittently scanned CGM (isCGM). Their clinical use has been widely increasing during the past 5 years. The aim of this study is to evaluate percentage of time in range (TIR) in a large group of children with type 1 diabetes (T1D) using glucose sensors with nonautomated insulin delivery systems, in a real-world setting. Methods: An 11-center cross-sectional study was conducted during January-May 2019. Children with T1D <18 years, all using rtCGM or isCGM for >1 year, treated with multiple daily injections (MDI) or nonautomated insulin pump (IP), were recruited consecutively. Clinical data, HbA1c measurement, and CGM downloaded data were collected by each center and included in a centralized database for the analysis. Glucose metrics of four treatment strategies were analyzed: isCGM-MDI, rtCGM-MDI, isCGM-IP, and rtCGM-IP. Results: Data from 666 children with T1D (51% male and 49% female), median age 12 years, diabetes duration 5 years, were analyzed. An rtCGM was used by 51% of the participants, and a nonautomated IP by 46%. For isCGM-MDI, rtCGM-MDI, isCGM-IP, and rtCGM-IP, the median TIR 70-180 mg/dL values were 49%, 56%, 56%, and 61% (P < 0.001), respectively; HbA1c 7.6%, 7.5%, 7.3%, and 7.3% (P < 0.001), respectively. Use of rtCGM was associated with significant lower time below target range <70 mg/dL and reduced the percentage coefficient of variation of glucose (%CV), independently by the insulin delivery system used. Conclusions: Among nonautomated insulin delivery strategies, simultaneous use of rtCGM and IP was associated with higher percentage of TIR, lower time above range >180 mg/dL and lower HbA1c. If there are no barriers, an upgrade of the treatment strategy with a higher performing technology should be offered to all children who do not achieve blood glucose metrics within the suggested range.

Original languageEnglish
Pages (from-to)509-515
Number of pages7
JournalDiabetes Technology and Therapeutics
Volume22
Issue number7
DOIs
Publication statusPublished - Jul 2020
Externally publishedYes

Keywords

  • Coefficient of variation
  • Real-world evaluation
  • Time above range, %
  • Time below range
  • Time in range

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