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Reproducibility of Continuous Glucose Monitoring (CGM) in the Assessment of Glucose Metabolism Disorders in Children With Cystic Fibrosis (CGMUCODIAB)

25. september 2026 opdateret af: Hospices Civils de Lyon

Glucose metabolism disorders in cystic fibrosis (CF-GMD) are common and have a negative clinical impact. Screening currently relies on the oral glucose tolerance test (OGTT); however, this procedure is burdensome and complex for both patients and healthcare providers. Continuous glucose monitoring (CGM) is increasingly used in CF centers for CF-GMD screening, either alone or alongside the OGTT. While long-term (one-year) OGTT reproducibility is known to be poor, the short- and medium-term reproducibility of CGM remains unknown. This examination is poised to become a major tool in CF-GMD investigation, upon which critical therapeutic decisions could be based. The primary objective of this project is to evaluate the short-term variability of CGM data.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

30

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

10 år til 17 år (Barn)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Patients aged 10 to 17 years
  • Diagnosed with cystic fibrosis (CF)
  • Managed by the pediatric CF care center (CRCM) of the Groupement Hospitalier Est
  • Patients presenting with one of the following three stages are included: normal glucose tolerance with or without indeterminate glucose tolerance (INDET), impaired fasting glucose (IFG), and impaired glucose tolerance (IGT)

Exclusion Criteria:

  • Patients with treated or untreated diabetes
  • Patients presenting with a pulmonary exacerbation and currently receiving antibiotic therapy
  • Patients participating in another clinical trial that could interfere, in the investigator's judgment, with the study findings
  • Refusal of the patient and/or the legal guardian(s) to participate in the study
  • Pregnant, parturient, or breastfeeding women
  • Persons deprived of liberty by a judicial or administrative decision
  • Persons undergoing psychiatric care
  • Persons admitted to a healthcare or social institution for purposes other than research
  • Persons not affiliated with a social security scheme or beneficiaries of a similar scheme

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Diagnostisk
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Non-diabetic patient with cystic fibrosis

Children aged 10 to 17 years diagnosed with cystic fibrosis (CF). Patients presenting with one of the following three stages are included: normal glucose tolerance with or without indeterminate glucose tolerance (INDET), impaired fasting glucose (IFG), and impaired glucose tolerance (IGT).

Patients will be equipped with a continuous glucose monitoring (CGM) sensor (Dexcom ONE+).

Upon enrollment, patients will be equipped with a continuous glucose monitoring (CGM) sensor (Dexcom ONE+). Sensors will be placed on the posterior aspect of the dominant arm at M0, M3, and M6, and additionally on the non-dominant arm at M0 only, in order to evaluate site-dependent variability. At each time point, the sensors will be worn for 7 days to record various CGM parameters, including glycemic variability (analyzed between M0-M3 and M0-M6).

A 7-day dietary diary will be completed at M0, M3, and M6.

Participants will wear an actigraphy watch during 7 days at M0, M3 and M6

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
The variability of the "time in range" (%) parameter (70-140 mg/dL) between M0 and M3.
Tidsramme: From enrollment to 3 months

The variability of the "time in range" (%) parameter (70-140 mg/dL) between M0 and M3.

From enrollment to 3 months

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
The variability of other CGM parameters between M0 and M3: percentage of time in hypoglycemia (<70 mg/dL)
Tidsramme: From enrollment to 3 months

The variability of other CGM parameters between M0 and M3: percentage of time in hypoglycemia (<70 mg/dL)

From enrollment to 3 months
The variability of other CGM parameters between M0 and M3: percentage of time in hyperglycemia (>140 mg/dL)
Tidsramme: From enrollment to 3 months

The variability of other CGM parameters between M0 and M3: percentage of time in hyperglycemia (>140 mg/dL)

From enrollment to 3 months
The variability of other CGM parameters between M0 and M3: glycemic variability (%)
Tidsramme: From enrollment to 3 months

The variability of other CGM parameters between M0 and M3: glycemic variability (%)

From enrollment to 3 months
The variability of other CGM parameters between M0 and M3: mean glucose level (mg/dL)
Tidsramme: From enrollment to 3 months

The variability of other CGM parameters between M0 and M3: mean glucose level (mg/dL)

From enrollment to 3 months
The variability of other CGM parameters between M0 and M3: number of glucose excursions >200 mg/dL
Tidsramme: From enrollment to 3 months

The variability of other CGM parameters between M0 and M3: number of glucose excursions >200 mg/dL

From enrollment to 3 months
The variability of other CGM parameters between M0 and M3: estimated HbA1c (eA1c)
Tidsramme: From enrollment to 3 months

The variability of other CGM parameters between M0 and M3: estimated HbA1c (eA1c)

From enrollment to 3 months
The variability of CGM parameters between M0 and M6: "time in range" (%) (70-140 mg/dL)
Tidsramme: From enrollment to 6 months

The variability of CGM parameters between M0 and M6: "time in range" (%) (70-140 mg/dL)

From enrollment to 6 months
The variability of CGM parameters between M0 and M6: percentage of time in hypoglycemia (<70 mg/dL),
Tidsramme: From enrollment to 6 months

The variability of CGM parameters between M0 and M6: percentage of time in hypoglycemia (<70 mg/dL),

From enrollment to 6 months
The variability of CGM parameters between M0 and M6: percentage of time in hyperglycemia (>140 mg/dL),
Tidsramme: From enrollment to 6 months

The variability of CGM parameters between M0 and M6: percentage of time in hyperglycemia (>140 mg/dL),

From enrollment to 6 months
The variability of CGM parameters between M0 and M6: glycemic variability (%),
Tidsramme: From enrollment to 6 months

The variability of CGM parameters between M0 and M6: glycemic variability (%),

From enrollment to 6 months
The variability of CGM parameters between M0 and M6: mean glucose level (mg/dL),
Tidsramme: From enrollment to 6 months

The variability of CGM parameters between M0 and M6: mean glucose level (mg/dL),

From enrollment to 6 months
The variability of CGM parameters between M0 and M6: number of glucose excursions >200 mg/dL
Tidsramme: From enrollment to 6 months

The variability of CGM parameters between M0 and M6: number of glucose excursions >200 mg/dL

From enrollment to 6 months
The variability of CGM parameters between M0 and M6: estimated HbA1c (eA1c)
Tidsramme: From enrollment to 6 months

The variability of CGM parameters between M0 and M6: estimated HbA1c (eA1c)

From enrollment to 6 months
The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): "time in range" (%) (70-140 mg/dL)
Tidsramme: From enrollment to 3 months

The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): "time in range" (%) (70-140 mg/dL)

From enrollment to 3 months
The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): percentage of time in hypoglycemia (<70 mg/dL),
Tidsramme: From enrollment to 3 months

The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): percentage of time in hypoglycemia (<70 mg/dL),

From enrollment to 3 months
The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): percentage of time in hyperglycemia (>180 mg/dL)
Tidsramme: From enrollment to 3 months

The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): percentage of time in hyperglycemia (>180 mg/dL)

From enrollment to 3 months
The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): glycemic variability (%)
Tidsramme: From enrollment to 3 months

The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): glycemic variability (%)

From enrollment to 3 months
The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): mean glucose level (mg/dL)
Tidsramme: From enrollment to 3 months

The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): mean glucose level (mg/dL)

From enrollment to 3 months
The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): number of glucose excursions >200 mg/dL
Tidsramme: From enrollment to 3 months

The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): number of glucose excursions >200 mg/dL

From enrollment to 3 months
The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): estimated HbA1c (eA1c)
Tidsramme: From enrollment to 3 months

The variability of CGM parameters according to the sensor placement site between M0 and M3 (inter-arm variability): estimated HbA1c (eA1c)

From enrollment to 3 months
The variability of CGM parameters according to physical activity (percentage of daytime activity) : Variation in the number of steps
Tidsramme: From enrollment to 3 months and 6 months

The variability of CGM parameters according to physical activity (percentage of daytime activity), Variation in the number of steps

From enrollment to 3 months and 6 months
The variability of CGM parameters according to body composition (body fat percentage)
Tidsramme: From enrollment to 3 months and 6 months

The variability of CGM parameters according to body composition (body fat percentage) : body fat in kg

From enrollment to 3 months and 6 months
The variability of CGM parameters according to body composition
Tidsramme: From enrollment to 3 months and 6 months

The variability of CGM parameters according to body composition (lean mass percentage) : body fat in kg

From enrollment to 3 months and 6 months
The variability of CGM parameters according to body composition (fat mass percentage in the dominant arm)
Tidsramme: From enrollment to 3 months and 6 months

The variability of CGM parameters according to body composition (fat mass percentage in the dominant arm) : body fat in kg

From enrollment to 3 months and 6 months
The variability of CGM parameters according to body composition (fat mass percentage in the non-dominant arm) : body fat in kg
Tidsramme: From enrollment to 3 months and 6 months

The variability of CGM parameters according to body composition (fat mass percentage in the non-dominant arm) : body fat in kg

From enrollment to 3 months and 6 months
The variability of CGM parameters according to nutritional intake : Daily nutritional intake (kcal)
Tidsramme: From enrollment to 3 months and 6 months

The variability of CGM parameters according to nutritional intake : Daily nutritional intake (kcal)

From enrollment to 3 months and 6 months
The variability of CGM parameters according to nutritional intake : carbohydrates (kg)
Tidsramme: From enrollment to 3 months ans 6 months

The variability of CGM parameters according to nutritional intake : carbohydrates (kg)

From enrollment to 3 months ans 6 months
The variability of CGM parameters according to nutritional intake : fats (kg)
Tidsramme: From enrollment to 3 months and 6 months

The variability of CGM parameters according to nutritional intake : fats (kg)

From enrollment to 3 months and 6 months
The variability of CGM parameters according to nutritional intake : proteins (kg)
Tidsramme: From enrollment to 3 months and 6 months

The variability of CGM parameters according to nutritional intake : proteins (kg)

From enrollment to 3 months and 6 months

Samarbejdspartnere og efterforskere

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Sponsor

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. november 2026

Primær færdiggørelse (Anslået)

1. februar 2028

Studieafslutning (Anslået)

1. maj 2028

Datoer for studieregistrering

Først indsendt

21. september 2026

Først indsendt, der opfyldte QC-kriterier

25. september 2026

Først opslået (Faktiske)

1. oktober 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

1. oktober 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

25. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 69HCL25_1040
  • 2026-A00194-47 (Anden identifikator: ID-RCB)

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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