The Impact of Continuous Glucose Monitoring on Glucose Variability and Weight Loss in Individuals With Prediabetes and Obesity
Recruiting · NCT07423065 · Interventional (participants receive a specific treatment) · Lead sponsor: University of Primorska
View the official record on ClinicalTrials.gov →Interventions studied
Continuous Glucose Monitoring (CGM)
What this trial is about
This randomized, crossover interventional study evaluates the effects of real-time (open) versus blinded continuous glucose monitoring (CGM) on glycemic variability, lifestyle behaviors, and metabolic outcomes in adults with prediabetes and overweight or obesity (BMI ≥ 27 kg/m²). Thirty participants will undergo both open and blinded CGM phases, separated by a washout period. The study aims to assess whether access to real-time glucose data promotes behavioral change and improves metabolic health compared with blinded CGM use.
Who can take part
Age range
18 Years to 70 Years
Sex
All (male and female)
Healthy volunteers
No - a diagnosis or condition is required
Phase
Not applicable (e.g. observational or device study)
Study type
Interventional (participants receive a specific treatment)
Inclusion criteria
- Adults aged 18-70 years.
- BMI ≥ 27 kg/m² (overweight or obese).
- Prediabetes, confirmed by:
- Impaired fasting glucose (IFG: 5.6-6.9 mmol/L), and/or Impaired glucose tolerance (IGT: 2-hour OGTT glucose 7.8-11.0 mmol/L).
- Stable body weight (±3 kg) in the last 3 months.
- No current use of antidiabetic or weight-loss medications.
- Willingness and ability to wear a CGM device as instructed.
- Capacity to provide written informed consent.
- Recruitment from the Diabetes Outpatient Clinic, Community Health Center Koper (identified and invited from the clinic's database).
Exclusion criteria
- Diagnosis of type 1 or type 2 diabetes mellitus (fasting glucose ≥ 7.0 mmol/L or HbA1c ≥ 6.5%).
- Current or recent (within 3 months) use of:
- Any antidiabetic medication (insulin, metformin, GLP-1RA, SGLT2i, etc.), or anti-obesity pharmacotherapy.
- Pregnancy, breastfeeding, or planned pregnancy during the study period.
- Severe chronic disease that could influence glucose metabolism or study participation (e.g., chronic liver disease, renal failure, active malignancy).
- Endocrine disorders affecting metabolism (e.g., untreated thyroid disease, Cushing's syndrome).
- Severe psychiatric illness or cognitive impairment limiting adherence or comprehension.
- Use of medications known to affect glucose metabolism (e.g., corticosteroids, atypical antipsychotics).
- Implanted electronic medical devices (e.g., pacemaker, defibrillator) that may interfere with CGM function.
- Known allergy or skin reaction to CGM adhesives or device materials.
- Participation in another interventional study within the previous 3 months.
Where it is running
3 locations listed.
- University of Primorska, Faculty of Health Sciences - Izola, Slovenia
- Diabetes Outpatient Clinic, Community Health Center Koper, Slovenia - Koper, Slovenia
- Department Of endocrinology and diabetes, Medical Faculty, University of Ljubljana - Ljubljana, Slovenia