Diabetes technology

Determination of Time in Range Associated With HbA1c ≤7% in a Prospective Cohort of Patients With Type 1 Diabetes Using Continuous Glucose Monitoring for Three Months

J Diabetes Sci TechnolPublished Diagnostic accuracy study

Authors' conclusion

Our data suggest that the %TIR adequately identifies patients with HbA1c ≤7%. A target of TIR ≥75%, rather than the currently recommended TIR ≥70%, may be a more suitable value for optimal glycemic control.

Study context

Population
Patients with T1D treated with hybrid closed loop (HCL), followed for three months; 58.1% women, 47% overweight or obese, 33% with high glycemic variability
Participants
118 patients
Outcome
Ability of %TIR to distinguish patients with HbA1c ≤7% (ROC curve analysis)
Follow-up
Three months
Methodological detailsprospective, cohort-based
  • Prospective
  • Cohort-based

Performance

As reported in the abstract

Discrimination of HbA1c ≤7% by %TIR
Test or modelAUCBest cutoffSensitivitySpecificity
%TIR0.7485 (95% CI 0.6608-0.8363)%TIR ≥75.570%67%

%TIR

AUC0.7485 (95% CI 0.6608-0.8363)
Best cutoff%TIR ≥75.5
Sensitivity70%
Specificity67%
Moderate negative correlation between %TIR and HbA1c (R = −.54)
P < 0.001

Further findings

Subgroup with CV ≥36%

Findings were similar among those with CV ≥36%

Original publication

Determination of Time in Range Associated With HbA1c ≤7% in a Prospective Cohort of Patients With Type 1 Diabetes Using Continuous Glucose Monitoring for Three Months. J Diabetes Sci Technol. Published 5 July 2022. doi:10.1177/19322968221108424

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