ClinicalTrials.gg
RecruitingNCT06646107Updated Nov 19, 2025

Adherence to Mediterranean Diet in Type 1 Diabetes Initiating Minimed 780G: Glucose Metrics vs Insulin Metrics, is There a Difference

An observational study in Type1diabetes, sponsored by Attikon Hospital. Recruiting at 1 site in Greece. Open to participants aged 12 Years to 80 Years. Per ClinicalTrials.gov, last updated 2025-11-19.

Sponsored by Attikon Hospital · Observational

From the registry’s dates

  • Started Mar 2025; still recruiting 1 year 8 months later.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
240
Ages
12 Years to 80 Years
Sex
All
01

Study summary

In this observaltional study, 240 patients aged >12 years old with T1DM who are on multiple daily injections or insulin pump and are scheduled to start using MiniMed 780G system will be included.We aim to compare patients' adherence to Mediterranean diet (MD) before and 12 weeks after initiation of MiniMed 780G and its association with CGM and insulin metrics, as well as anthropometric measurements, BMI, body composition, lipid levels, blood pressure and gut microbioma. Moreover, at baseline, at six and 12 months, markers of endothelial and cardiovascular function will be also assessed and associated with the use of Minimed 780G and the adherence to MD.

Read the detailed description

This observational study will include 240 participants (80 participants per country) from IGI region (Italy, Greece and Israel), children adolescents and young adults (12> years old) with T1D that are on multiple daily injections or insulin pump and are scheduled to start using MiniMed 780G system. After a 7-day run-in period, participants will be evaluated with food intake log and adherence to Meditteranean Diet (MD) with PREDIMED questionnaire. One hour session on MD and healthy impact on Diabetes will be provided to all participants and will be assigned to initiate MiniMed 780G and followed for 12 weeks. HbA1c, CGM and Insulin Metrics, anthropometric measurements, body composition, blood pressure and lipid leves as well a gut microbioma will be performed at baseline and 12 weeks, after MiniMed 780G initiation. A 7-day food diary logbook will be collected to identify the amount and type of the food at baseline and at the end of the study. At baseline, at 6 and at 12 months, markers of endothelial and cardiovascular function will also be assessed. An extension phase will include additional 3 and 6, which concludes one year of follow-up.

02

Conditions studied

  • Type1diabetes
03

In context

Diabetes Mellitus, Type 1

3,754 studies on the registry are indexed under Diabetes Mellitus, Type 1; 600 are open to participants now.

This study's planned enrollment of 240 is above the median of 125 across 792 observational studies indexed under Diabetes Mellitus, Type 1.

Browse Diabetes Mellitus, Type 1 studies →

Lead sponsor

Attikon Hospital is the lead sponsor of 86 studies on the registry; 17 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
12 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Children adolescents and young adults (12> years old) with T1D that are on multiple daily injections or insulin pump and are scheduled to start using MiniMed 780G system.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Clinical diagnosis of type 1 diabetes >1 year prior to consent date. Diagnosis of type 1 diabetes is based on the investigator's judgment; C peptide level and antibody determinations are not required.
  2. \< 12.5%
  3. Age >7years at the initiation of the system
  4. Multiple Daily Injections (Basal Bolus therapy) with Total daily insulin use of great than 8.0 units per day over a 1-week period
  5. Clinically able to start the AHCL system
  6. History of 3 clinic visits in the last year

Exclusion criteria

Exclusion Criteria:

1. Diabetic Ketoacidosis in the 6 months prior to screening visits

-

Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
240 participants (estimated)
Target follow-up
12 Months
Patient registry
Yes

Groups and cohorts

  • Type 1 Diabetes Mellitus

    patients aged \>12 years old with T1DM who are on multiple daily injections or insulin pump and are scheduled to start using MiniMed 780G

    Device: MInimed 780G

Interventions

  • DeviceMInimed 780G

    Minimed 780G HCL system (Metronic, Northridge, Ca, USA) is ConformitèEuropëenne(CE)-marked and includes additional functionality aiming to provide further protections from high glucose levels. When the system is used in Auto Mode automatically calculate the insulin dose based on information received from CGM. Signals are converted by the transmitter to sensor glucose values. Sensor values are then transmitted to the insulin pump. Sensor glucose and insulin delivery data are stored by the pump and may be uploaded. The HCL system can be programmed to automatically calculate insulin doses (both basal insulin and correction boluses) based on information received from CGM780G and the adherence to MD.

06

What researchers measure

Primary outcomes

  1. Changes in Hba1c

    Differences in HbA1c at baseline and 3 months after the initiation of MiniMed 780G

    Time frame: Baseline, 3 months

  2. Changes in TIR

    Changes in TIR at baseline and 3 months after the initiation of MiniMed 780G

    Time frame: Baseline, 3 months

  3. Changes in TBR

    Changes in TBR at baseline and 3 months after the initiation of MiniMed 780G

    Time frame: Baseline, 3 months

  4. Changes in TAR

    Changes in TAR at baseline and 3 months after the initiaton of MiniMed 780G

    Time frame: Baseline, 3 months

  5. Changes in bolus doses

    Changes in bolus dosed at baseline and 3 months after the initiation of MiniMed 780G

    Time frame: Baseline, 3 months

  6. Changes in basal doses

    Changes in basal doses at baseline and 3 months after the initiation of MiniMed 780G

    Time frame: Baseline, 3 months

  7. Changes in autocorrection doses

    Changes in autocorrection doses between baseline and 3 months after the initiation of MiniMed 780G:

    Time frame: Baseline, 3 months

Secondary outcomes

  1. Changes in pulse wave velocity(m/s)

    Changes in pulse wave velocity at baseline and at 6 and 12 months after the initiation of MiniMed 780G

    Time frame: Baseline, 6 months, 12 months

  2. Changes in endothelial glycocalyx thickness (μm)

    Changes in endothelial glycocalyx thickness at baseline and at 6 and 12 months after the initiation of MiniMed 780G

    Time frame: Baseline, 6 months, 12 months

  3. Changes in global longidutinal strain (%)

    Changes in global longidutinal strain at baseline and at 6 and 12 months after the initiation of MiniMed 780G

    Time frame: Baseline, 6 months, 12 months

  4. Changes in CAP (dB/m)

    Changes in liver steatosis at baseline and at 6 and 12 months after the initiation of MiniMed 780G as assessed by the measurement of CAP. CAP score will be used as an index of liver fat content, with normal values being \< 238 dB/m. \<237 dB/m (S0, no steatosis), 237 -259 dB/m (S1, mild steatosis), 259 -291 dB/m (S2, moderate steatosis), and 291 -400 dB/m (S3,severe steatosis). E score will be used as an index of liver fibrosis. The cut-off values for fibrosis (F) were as follows:(1) \<5.5 kPa (F0, no fibrosis), (2) 5.5-8.0 kPa (F1, mild fibrosis), (3) 8.0-10.0 kPa (F2, moderate fibrosis),(4) 11.0-16.0 kPa (F3, severe fibrosis), and (5) \>16.0 kPa (F4, cirrhosis).

    Time frame: Baseline, 6 months, 12 months

  5. Changes in gut microbioma

    Changes in gut microbioma at baseline and at 3 months after the initiation of MiniMed 780G.

    Time frame: Baseline,3 months

  6. Changes in coronary flow reserve

    Changes in coronary flow reserve at baseline, at six months and at 12 months after the initiation of MiniMed 780G.

    Time frame: Baseline, 6 months, 12 months

  7. Changes in central aortic blood pressure (mmHg)

    Changes in central aortic blood pressure at baseline and at 6 and 12 months after the initiation of MiniMed 780G.

    Time frame: Baseline, 6 months, 12 months

  8. Changes in Ε score (Kpa)

    Changes in liver steatosis at baseline and at 6 and 12 months after the initiation of MiniMed 780G as assessed by E score. E score will be used as an index of liver fibrosis. The cut-off values for fibrosis (F) were as follows:(1) \<5.5 kPa (F0, no fibrosis), (2) 5.5-8.0 kPa (F1, mild fibrosis), (3) 8.0-10.0 kPa (F2, moderate fibrosis),(4) 11.0-16.0 kPa (F3, severe fibrosis), and (5) \>16.0 kPa (F4, cirrhosis).

    Time frame: Baseline, 6 months, 12 months

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Mar 2025 to primary completion in Aug 2025, 5 months.

Of 249 non-industry observational studies under Diabetes Mellitus, Type 1, half reached primary completion within 30 months of starting (the median), counting those still running; a quarter within 12 and three quarters within 78. This study's 5 months is below that.

Counting every sponsor, half of 299 studies reached it within 30 months; a quarter within 12 and three quarters within 69.

How these figures are worked out, and which studies are left out of them.

Registered
Oct 13, 2024
First posted
Oct 17, 2024
StartActual
Mar 1, 2025
Primary completionActual
Aug 31, 2025
CompletionEst.
Jan 31, 2026
Last update
Nov 19, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Nov 19, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06646107
Lead sponsor
Attikon Hospital
Responsible party
VAIA LAMBADIARI (Professor of Internal Medicine-Endocrinology, Attikon Hospital) — Principal investigator
First posted
Oct 17, 2024
Start date
Mar 1, 2025
Primary completion
Aug 31, 2025
Completion
Jan 31, 2026 (estimated)
Last update
Nov 19, 2025

Study contacts

VAIA LAMBADIARI, Professor
Contact
vlambad@otenet.gr
2105831148

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

Interested in this study?

Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.

Contact study team

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion