Longitudinal Continuous Glucose Monitoring Study in Young Children With Presymptomatic Type 1 Diabetes Followed in

Aveni Haynes1,2, Grant J Smith1, Alexandra Tully1

  • 1Children's Diabetes Centre, The Kids Research Institute Australia, Nedlands, Western Australia, Australia.

Diabetes Care
|August 19, 2025
PubMed

Insights

Continuous glucose monitoring (CGM) data in children with presymptomatic type 1 diabetes shows high variability. Further research is needed to interpret these important glucose metrics.

Area of Science:

  • Pediatrics
  • Endocrinology
  • Diabetes Research

Background:

  • Type 1 diabetes (T1D) is an autoimmune disease affecting children.
  • Presymptomatic T1D can be identified through islet autoantibodies.
  • Early monitoring of glucose trends is crucial for understanding disease progression.

Purpose of the Study:

  • To analyze longitudinal continuous glucose monitoring (CGM) data in young children with presymptomatic type 1 diabetes.
  • To characterize glucose variability and trends before clinical diagnosis.
  • To assess the utility of CGM in early-stage T1D research.

Main Methods:

  • Utilized blinded CGM assessments every 3-6 months in children from the Australian ENDIA study with multiple islet autoantibodies.
  • Analyzed CGM-derived metrics including SD sensor glucose, coefficient of variation, mean sensor glucose, and time above 7.8 mmol/L (140 mg/dL).
  • Data collected between 2021 and 2024, correlating metrics with time from islet autoantibody detection.

Main Results:

  • Analyzed 178 CGM assessments from 36 children (median age 4.5 years at first assessment).
  • Observed significant within-person variability in serial CGM metrics, such as percent CGM time >7.8 mmol/L (ICC 0.30).
  • Data highlights challenges in interpreting CGM in this pediatric cohort.

Conclusions:

  • Significant within-person variability in CGM metrics was found in young children with presymptomatic T1D.
  • Further research is required to establish reliable interpretation guidelines for CGM data in this population.
  • CGM shows potential for monitoring but requires context for clinical application in early T1D.
Abstract

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