Diabetes complications

Nocturnal Hypoglycemia: Characterization with Continuous Glucose Monitoring in a Real-World Setting

Diabetes Technol TherPublished Retrospective cohort study

Authors' conclusion

These results showed that nocturnal hypoglycemia is characterized by longer duration and slower recovery than daytime hypoglycemia, with significant effects on next-day glycemic control, which emphasizes the need for improved prevention strategies.

Study context

Population
People with T1D or T2D using MDI; Continuous glucose monitoring (CGM) data during first month of use, January 2010–September 2023
Participants
3,696 vs 441
Exposure
Nocturnal vs diurnal hypoglycemia in T1D and T2D
  • T1Dn = 3,696
  • T2Dn = 441
Outcome
Frequency and duration of nocturnal vs diurnal hypoglycemic events (CGM readings <70 mg/dL or <54 mg/dL for ≥15 min)
Follow-up
First month of CGM use
Methodological detailsreal-world
  • Real-world

Main finding

As reported in the abstract

T1D nocturnal vs diurnal events per week, median [IQR]

0.54 [0.0, 1.5] vs 2.25 [0.64, 5.25]

T2D nocturnal vs diurnal events per week, median [IQR]

0 [0.0, 0.52] vs 0.30 [0.0, 1.21]

Observational data: associations, not effects.

Further findings

Next-day glycemia after nocturnal hypoglycemia

Significant changes in multiple glycemic parameters on days after nocturnal hypoglycemic events vs days after nights without hypoglycemia; suggests heightened risk of morning hypoglycemia

Original publication

Nocturnal Hypoglycemia: Characterization with Continuous Glucose Monitoring in a Real-World Setting. Diabetes Technol Ther. Published 21 August 2025. doi:10.1177/15209156251369884

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