Diabetes technology

Glycemia Risk Index (GRI) and international glucose targets before and 6 months after initiation of hybrid closed loop system in the CIRDIA, a French multisite out-of-hospital center

Diabetes MetabPublished Retrospective cohort study

Authors' conclusion

Setting a GRI threshold at 26 could be helpful to detect with a single number, potentially automatically calculated by CGM platforms, PwT1D who require further support.

Study context

Population
Persons with T1D initiating hybrid closed loop (HCL) in the CIRDIA, a French multisite out-of-hospital HCL initiation centersix-month data available
Participants
136 persons
Exposure
Ambulatory glucose profile (AGP) metrics at HCL initiation vs 3 and 6 months
Outcome
Percentage reaching efficacy and safety targets (EST): TIR >70 %, GMI <7 %, time-below-range (TBR)<70 <4 % and TBR<54 <1 %
Follow-up
M0, M3 and M6
Methodological detailsmultisite (n=7), out-of-hospital
  • Multisite (n=7)
  • Out-of-hospital

Main finding

As reported in the abstract

Reaching EST

Observational data: associations, not effects.

Further findings

OutcomeM0M3M6
GRI56.0 ± 20.930.1 ± 14.130.6 ± 13.8

GRI threshold for detecting patients reaching efficacy and safety targets (EST) (ROC analysis)

Best GRI threshold
<26
Specificity
92 %
NPV
93 %

Original publication

Glycemia Risk Index (GRI) and international glucose targets before and 6 months after initiation of hybrid closed loop system in the CIRDIA, a French multisite out-of-hospital center. Diabetes Metab. Published 6 February 2025. doi:10.1016/j.diabet.2025.101617

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