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Continuous Glucose Monitoring Parameter and Oral Glucose Tolerance Testing (OGTT) Parameters in Children and Young Adults With Cystic Fibrosis (CF)

9 novembre 2026 mis à jour par: Northwell Health

As modulator therapies extend the lifespan of CF patients, the detection of complications like Cystic Fibrosis Related Diabetes (CFRD) becomes increasingly vital. The current gold standard for CFRD screening, the 2-hour OGTT, is cumbersome and suffers from low compliance. This study proposes that Continuous Glucose Monitoring (CGM) could offer a more comprehensive, easier, and potentially more compliant screening method. The research aims to correlate various CGM parameters (e.g., time in hyperglycemia) with traditional glycemic markers like OGTT glucose levels, GMI, average glucose, variability, and HbA1c. Additionally, the research seeks to understand patient and parent/guardian preferences for CFRD screening modalities. This prospective observational study will involve CF patients wearing a Dexcom CGM around the time of standard OGTT and HbA1c tests, followed by surveys, with the ultimate goal of paving the way for CGM to improve early detection and management of dysglycemia in CF children.

Aperçu de l'étude

Statut

Recrutement

Les conditions

Intervention / Traitement

Description détaillée

As modulator therapy changes the landscape of cystic fibrosis (CF), children with CF will live longer and healthier lives with less pulmonary exacerbations. Still, other complications like Cystic Fibrosis Related Diabetes and underlying dysglycemia may become more apparent as lifespans of CF patients increase. It is therefore essential that clinicians have the tools to understand early stages of dysglycemia to prevent long term complications of CFRD. At present, 2 hours 75-gram OGTT remains the gold standard annual screen for CFRD. This test is both cumbersome for patients and limits a clinician's interpretation of glycemic control to a limited time frame. Although OGTT is currently used to diagnose CFRD, it can be cumbersome for patients and time consuming. OGTT compliance is therefore not surprisingly low in the CF population with about 49 % of CF centers having a more than 50% completion of annual OGTT. Continuous glucose monitoring (CGM), on the other hand, offers the ability to obtain more data on longer time periods in a much easier fashion. Thus, CGMs have the potential to glean a more fine-tuned understanding of a patient's glycemic control. Moreover, CGMs can make glycemic testing easier on patients, thereby increasing compliance of annual glycemic testing. The investigators hypothesize the correlation of CGM parameters of hyperglycemia like % of time > 180 mg/dl, % of time> 150 mg/dL with 1- and 2-hour OGTT glucose levels, Glucose Management Indicator (GMI), average glucose, glucose variability, and HbA1c levels. The investigators also aim to explore patient views and preferences of OGTT and CGM for screening of CFRD through surveys after CGM wear.

The investigators hope to be able to correlate 1- and 2-hour glucose values on OGTT to % in range parameters on a continuous glucose monitor. This will pave the way to better understand glycemic control in children with CF and risk for CFRD with data from a CGM even without an OGTT in the future. The investigators also hope to understand patient and parent/guardian preferences towards CFRD screening modalities.

Study Design: Prospective observational study. Eligible patients will have a CGM placed for up to10-day wear within the 3 months before or after clinically appropriate OGTT and A1c. OGTT testing will include 1- and 2-hour glucose levels and HbA1c as per standard of care. A Dexcom CGM will be placed in clinic onto the subjects upper arm. Survey exploring patient and parent/guardian preference will be provided after the CGM is removed.

Type d'étude

Interventionnel

Inscription (Estimé)

30

Phase

  • N'est pas applicable

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

Lieux d'étude

    • New York
      • New York, New York, États-Unis, 11042
        • Recrutement
        • Northwell Health
        • Contact:

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

10 ans à 25 ans (Enfant, Adulte)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

La description

Inclusion Criteria:

  1. Patients with Cystic Fibrosis
  2. 10-25 years of age who have obtained or will obtain a OGTT within 3 months of recruitment and CGM placement.

Exclusion Criteria:

  1. Diagnosis of diabetes mellitus type 1 or type 2
  2. Use of the following medication: steroid course, Metformin therapy,
  3. Concurrent CV disease or malignancy, kidney failure, lung transplant.
  4. Does not have access to personal Bluetooth device compatible with Dexcom G7 application.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Dépistage
  • Répartition: N / A
  • Modèle interventionnel: Affectation à un seul groupe
  • Masquage: Aucun (étiquette ouverte)

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: Pediatric Cystic Fibrosis Patients Undergoing Concurrent CGM Monitoring and OGTT Testing

Pediatric Cystic Fibrosis patients (ages 10-25 years) will wear a continuous glucose monitor (Dexcom G7) for up to 10 days within 3 months of an annual Oral Glucose Tolerance Test (OGTT) and complete a survey to evaluate correlations between CGM parameters and OGTT values and assess patient/guardian preferences for CFRD screening methods.

Continuous glucose monitors, such as Dexcom, have been established as a standard component of clinical care for continuous blood glucose monitoring. These devices are widely utilized in diabetes management clinics and demonstrate a robust safety and efficacy profile. The intervention also includes administration of a patient preference survey as outlined in the study protocol.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Average Blood Glucose Level from Continuous Glucose Monitoring
Délai: Up to 10 days of CGM wear (within 3 months of the Oral Glucose Tolerance Test).

Mean glucose level recorded over the continuous glucose monitoring (CGM) wear period (mg/dL)

Up to 10 days of CGM wear (within 3 months of the Oral Glucose Tolerance Test).

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Percentage of Time Glucose Exceeds 150 mg/dL from Continuous Glucose Monitoring
Délai: Up to 10 days of CGM wear (within 3 months of the Oral Glucose Tolerance Test).

The proportion of time during the CGM wear period that glucose levels were above 150 mg/dL (%)

Up to 10 days of CGM wear (within 3 months of the Oral Glucose Tolerance Test).
Percentage of Time Glucose Exceeds 180 mg/dL from Continuous Glucose Monitoring
Délai: Up to 10 days of CGM wear (within 3 months of the Oral Glucose Tolerance Test).

The proportion of time during the CGM wear period that glucose levels were above 180 mg/dL (%)

Up to 10 days of CGM wear (within 3 months of the Oral Glucose Tolerance Test).
Fasting Plasma Glucose Level from Oral Glucose Tolerance Test
Délai: Single measurement at the start of the OGTT (within 3 months of CGM wear).

Plasma glucose level measured after an overnight fast, as part of the Oral Glucose Tolerance Test (OGTT) (mg/dL)

Single measurement at the start of the OGTT (within 3 months of CGM wear).
1 hour Plasma Glucose Level from Oral Glucose Tolerance Test
Délai: Single measurement 1 hour after glucose load (within 3 months of CGM wear).

Plasma glucose level measured 1 hour after glucose administration as part of the Oral Glucose Tolerance Test (OGTT) (mg/dL)

Single measurement 1 hour after glucose load (within 3 months of CGM wear).
2-Hour Plasma Glucose Level from Oral Glucose Tolerance Test
Délai: Single measurement 2 hours after glucose load (within 3 months of CGM wear).

Plasma glucose level measured 2 hours after glucose load administration during the OGTT (mg/dL)

Single measurement 2 hours after glucose load (within 3 months of CGM wear).
Forced Expiratory Volume in 1 Second (FEV1) as a Percentage of Predicted
Délai: Within 3 months of CGM placement (standard of care assessment).

Lung function parameter reflecting the volume of air exhaled in the first second during a forced breath, expressed as a percentage of the predicted value. (%)

Within 3 months of CGM placement (standard of care assessment).
Forced Vital Capacity (FVC) as a Percentage of Predicted
Délai: Within 3 months of CGM placement (standard of care assessment).

Lung function parameter reflecting the total volume of air exhaled during a forced breath, expressed as a percentage of the predicted value (%)

Within 3 months of CGM placement (standard of care assessment).
Hemoglobin A1c (HbA1c) Level
Délai: At the time of OGTT (within 3 months of CGM wear).

A measure of average blood glucose level (%)

At the time of OGTT (within 3 months of CGM wear).
Body Mass Index (BMI) Z-Score
Délai: Within 3 months of CGM placement (standard of care assessment).

Age- and sex-adjusted Body Mass Index standardized score, reflecting nutritional status (z-score)

Within 3 months of CGM placement (standard of care assessment).
Response to Survey Question on CFRD Screening Preferences
Délai: After 10 days of CGM wear

Participant's (and/or parent/guardian's) response to the Likert scale questions regarding preferences for Cystic Fibrosis Related Diabetes

After 10 days of CGM wear

Collaborateurs et enquêteurs

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Parrainer

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Publications générales

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

23 juin 2025

Achèvement primaire (Estimé)

1 août 2027

Achèvement de l'étude (Estimé)

1 août 2027

Dates d'inscription aux études

Première soumission

29 juin 2026

Première soumission répondant aux critères de contrôle qualité

9 novembre 2026

Première publication (Réel)

12 novembre 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

12 novembre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

9 novembre 2026

Dernière vérification

1 octobre 2026

Plus d'information

Termes liés à cette étude

Autres numéros d'identification d'étude

  • 24-0945-CCMC

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Oui

produit fabriqué et exporté des États-Unis.

Oui

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