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Diabetes & Endocrinology

Longitudinal Glycemic Trajectories in Adults with Type 1 Diabetes: Insights from a Three-Year Multicenter CGM Study

MedXY Editorial TeamSep 21, 2026
Glycemic Controlβ-cell functiontype 1 diabetescontinuous glucose monitoring

Six line graphs compare three-year continuous glucose monitoring trajectories by age, chronic kidney disease, and beta-cell failure. Time in range from 70 to 180 milligrams per decilitre generally increases across follow-up months, while time below range under 70 milligrams per decilitre remains lower. Each comparison presents high-risk and reference groups with monthly rates, interaction beta values, P values, and variability bands. Clinical implications state that good control is achievable for older age and chronic kidney disease groups, while beta-cell failure limits achieving targets.

Highlight

  • Older age and chronic kidney disease (CKD) subgroups demonstrated improvements in glycemic control over three years without increased hypoglycemia risk.
  • Severe β-cell failure was associated with more glycemic variability and hypoglycemia, limiting improvements in glucose control despite monitoring.
  • Higher BMI and elevated triglyceride-glucose (TyG) index were linked to lower absolute time in range (TIR), but those with highest TyG showed greater glycemic improvement longitudinally.
  • Considerable intragroup variability supports tailoring glycemic targets informed by continuous glucose monitoring (CGM) trajectories rather than uniform goals.

Study Background

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This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.

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