DiabetesNCT02673203
Investigation Into the Effects of Blood Glucose Levels Upon Eating Behavior in Lean and Obese Non-diabetic and Diabetic Subjects
A study testing Continuous Glucose Monitoring System (CGMS) and Food log in people with Diabetes, run by Yale University at 2 sites in United States.
Trial summary
To investigate whether the daily glucose profiles as assessed by continuous glucose monitoring for 1 week of normal weight and obese individuals relate to hunger levels and food intake. Read more about this study
- Who is it for?
- Ages 18 to 65 yearsHealthy volunteers can take part
- Conditions the study is for
- Diabetes
- What is being tested?
- Continuous Glucose Monitoring System (CGMS) and Food log
- Type of treatment
- Medical device, Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 31 participants
- Where
- 2 sitesUnited States
- Study dates
- Feb 2016to 14 Dec 2017
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- A1c < 10.5 %
Who cannot join
- BMI <18 (no upper limit),
- Creatinine > 1.5 mg/dL,
- Hgb < 10 mg/dL,
- ALT > 2.5 X ULN,
- untreated thyroid disease,
- uncontrolled hypertension,
Show all 15Show fewer
- known neurological disorders,
- untreated psychiatric disorders,
- use of antidepressants and psychiatric medications,
- use of weight loss medications in the 6 months prior to the study,
- malignancy,
- smoking,
- current or recent steroid use in last 3 months,
- history of current illicit drug use;
- for women: pregnancy, or breastfeeding.
Trial locations and contacts
2 sites in 1 country.
United States2 sites
Yale New Haven Hospital
New Haven, Connecticut, 06519-1362
Yale University School of Medicine
New Haven, Connecticut, 06520
About this study
To investigate whether the daily glucose profiles as assessed by continuous glucose monitoring for 1 week of normal weight and obese individuals relate to hunger levels and food intake.
Read the detailed description
To evaluate the effect of blood glucose levels on eating behavior in a population of patients with diabetes in a free-living environment; the investigators plan to study lean healthy control subjects (BMI <25 kg/m2) and obese non-diabetic subjects (BMI > 30 kg/m2).
The participants who qualify will be invited to use the CGMS (DEXCOM G4 Platinum) for up to 7 days. On the visit for placement of the CGMS: 1) the participants will be explained by one of the study physicians how to use a glucometer (FreeStyle or Accu-Check), 2) they will have the CGMS inserted under the skin, and 3) they will be instructed how to fill up the food log (informational brochures are available at the end of the protocol. On the second visit (up to 7 days after the initial visit) the CGMS will be removed from the skin and the glucose meter and food log will be returned to the investigators.
When this study was initially designed, it incorporated 2 additional arms in the study: T1DM and obese T2DM patients. These patients were never recruited for the study.
- Conditions
- Diabetes
- Being tested
- Continuous Glucose Monitoring System (CGMS), Food log
- Keywords
- glucose monitoring, hunger levels, food intake
- Medical subject headings
- Diabetes Mellitus
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Continuous Glucose Monitoring System (CGMS)Device
Also called DEXCOM G4 Platinum
The CGMS consists of 3 parts: sensor, transmitter and monitor. The small sensor measures the glucose levels from the interstitial tissue. The transmitter is attached on top of the sensor and connects wirelessly to the monitor. The sensor is sterile and comes in an unopened package. It has a plastic wire-like tip that is placed under the skin and continuously measures the glucose levels. One of the study physicians will insert the CGMS wire-like tip under the volunteer's skin with the use of the DEXCOM sensor insertion kit. The transmitter is snapped to the sensor pod and the sensor/transmitter unit will be attached to the skin with an adhesive patch. The monitor is the size of a small hand-held device with a digital screen that displays a graph showing the glucose levels from the previous 4-24 hours.
Food logBehavioural
The Food Record will ask about amount and type of food consumed throughout the day. The participants will also register how hungry they are before the meal and how full they feel after they ate, and type and duration of physical activity
| Study group | Role | What they receive |
|---|---|---|
| Lean Healthy Control | Active comparator | (BMI <25 kg/m2) Receives: Device: Continuous Glucose Monitoring System (CGMS); Behavioral: Food log |
| Obese non-diabetic subject | Active comparator | BMI > 30 kg/m2 Receives: Device: Continuous Glucose Monitoring System (CGMS); Behavioral: Food log |
What is being measured
The primary outcome is the main question the study is designed to answer.
Rate of Changing Glucose Level
The CGM sensor measures the glucose levels from the interstitial tissue. Presented is the rate of changing glucose level (mg/dl/min).
Measured: 3-5 days
Glucose Peak
The CGM sensor measures the glucose levels from the interstitial tissue. Presented is the glucose peak (mg/dl).
Measured: 3-5 days
Glucose Nadir
The CGM sensor measures the glucose levels from the interstitial tissue. Presented is the glucose nadir (mg/dl).
Measured: 3-5 days
Secondary outcomes (6)
Difference in Glucose Peak and Nadir
The CGM sensor measures the glucose levels from the interstitial tissue. Presented is the difference in glucose peak and nadir (mg/dl).
Measured: 3-5 days
Average Daily Hunger Rating
Average daily hunger was measured using a self-report scale. Hunger is measured on a scale from 1-10. 10 is the most hungry, 1 is the least hungry.
Measured: 3-5 days
Nutirion Intake: Energy
Data were collected through food journals. Energy and macronutrient composition were calculated from self-reported food records based on Nutrition Data System for Research (NDS-R). Presented is the average daily energy intake (kcal/day).
Measured: 3-5 days
Nutirion Intake: Carbohydrate
Data were collected through food journals. Energy and macronutrient composition were calculated from self-reported food records based on Nutrition Data System for Research (NDS-R). Presented is the average daily carbohydrate intake (g/day).
Measured: 3-5 days
Nutirion Intake: Fat
Data were collected through food journals. Energy and macronutrient composition were calculated from self-reported food records based on Nutrition Data System for Research (NDS-R). Presented is the average daily fat intake (g/day).
Measured: 3-5 days
Nutirion Intake: Protein
Data were collected through food journals. Energy and macronutrient composition were calculated from self-reported food records based on Nutrition Data System for Research (NDS-R). Presented is the average daily protein intake (g/day).
Measured: 3-5 days
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 Feb 2016 (estimated)
- Study startFeb 2016
- Primary completion14 Dec 2017
- Study completion14 Dec 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for DiabetesStudies of the same condition, open and under way.
- More trials run by Yale UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Diagnosis
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 31 participants (actual)
Sponsor and investigators
- Lead sponsor
- Yale University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Renata Belfort De Aguiar, MD, PhD, Principal investigator, Yale University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02673203
- Sponsor's protocol ID
- 1503015469
- Other IDs
- 1K23DK098286-01A1
- Status last verified
- Apr 2022
- First submitted
- 1 Feb 2016
- Last updated
- 5 May 2022
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 5 May 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Investigation Into the Effects of Blood Glucose Levels Upon Eating Behavior in Lean and Obese Non-diabetic and Diabetic Subjects
- ClinicalTrials.gov ID
- NCT02673203
- Acronym / sponsor ID
- 1503015469
- Conditions
- Diabetes
- Keywords
- glucose monitoring, hunger levels, food intake
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 31 participants (actual)
- Lead sponsor
- Yale UniversityUniversity, hospital or other
- Collaborators
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Study start
- Feb 2016 (actual)
- Primary completion
- 14 Dec 2017 (actual)
- Study completion
- 14 Dec 2017 (actual)
- First posted
- 3 Feb 2016 (estimated)
- Results
- Posted 22 Jan 2020
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
To investigate whether the daily glucose profiles as assessed by continuous glucose monitoring for 1 week of normal weight and obese individuals relate to hunger levels and food intake.
Detailed description
To evaluate the effect of blood glucose levels on eating behavior in a population of patients with diabetes in a free-living environment; the investigators plan to study lean healthy control subjects (BMI <25 kg/m2) and obese non-diabetic subjects (BMI > 30 kg/m2).
The participants who qualify will be invited to use the CGMS (DEXCOM G4 Platinum) for up to 7 days. On the visit for placement of the CGMS: 1) the participants will be explained by one of the study physicians how to use a glucometer (FreeStyle or Accu-Check), 2) they will have the CGMS inserted under the skin, and 3) they will be instructed how to fill up the food log (informational brochures are available at the end of the protocol. On the second visit (up to 7 days after the initial visit) the CGMS will be removed from the skin and the glucose meter and food log will be returned to the investigators.
When this study was initially designed, it incorporated 2 additional arms in the study: T1DM and obese T2DM patients. These patients were never recruited for the study.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Lean Healthy Control | Active comparator | Device: Continuous Glucose Monitoring System (CGMS), Behavioral: Food log(BMI <25 kg/m2) |
| Obese non-diabetic subject | Active comparator | Device: Continuous Glucose Monitoring System (CGMS), Behavioral: Food logBMI > 30 kg/m2 |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- A1c < 10.5 %
Key exclusion criteria (15 listed)
- BMI <18 (no upper limit),
- Creatinine > 1.5 mg/dL,
- Hgb < 10 mg/dL,
- ALT > 2.5 X ULN,
- untreated thyroid disease,
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Continuous Glucose Monitoring System (CGMS)Also: DEXCOM G4 PlatinumThe CGMS consists of 3 parts: sensor, transmitter and monitor. The small sensor measures the glucose levels from the interstitial tissue. The transmitter is attached on top of the sensor and connects wirelessly to the monitor. The sensor is sterile and comes in an unopened package. It has a plastic wire-like tip that is placed under the skin and continuously measures the glucose levels. One of the study physicians will insert the CGMS wire-like tip under the volunteer's skin with the use of the DEXCOM sensor insertion kit. The transmitter is snapped to the sensor pod and the sensor/transmitter unit will be attached to the skin with an adhesive patch. The monitor is the size of a small hand-held device with a digital screen that displays a graph showing the glucose levels from the previous 4-24 hours. | Device | Lean Healthy Control, Obese non-diabetic subject |
| Food logThe Food Record will ask about amount and type of food consumed throughout the day. The participants will also register how hungry they are before the meal and how full they feel after they ate, and type and duration of physical activity | Behavioural | Lean Healthy Control, Obese non-diabetic subject |
Primary outcome
Rate of Changing Glucose Level
Time frame: 3-5 days
The CGM sensor measures the glucose levels from the interstitial tissue. Presented is the rate of changing glucose level (mg/dl/min).
Glucose Peak
Time frame: 3-5 days
The CGM sensor measures the glucose levels from the interstitial tissue. Presented is the glucose peak (mg/dl).
Glucose Nadir
Time frame: 3-5 days
The CGM sensor measures the glucose levels from the interstitial tissue. Presented is the glucose nadir (mg/dl).
6 secondary outcomes
Difference in Glucose Peak and Nadir
Time frame: 3-5 days
Average Daily Hunger Rating
Time frame: 3-5 days
Nutirion Intake: Energy
Time frame: 3-5 days
Nutirion Intake: Carbohydrate
Time frame: 3-5 days
Nutirion Intake: Fat
Time frame: 3-5 days
Nutirion Intake: Protein
Time frame: 3-5 days
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 5 May 2022.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Renata Belfort De Aguiar, MD, PhD principal investigator
Yale University
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Continuous Glucose Monitoring System (CGMS) and Food log in people with Diabetes, run by Yale University at 2 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 15 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 5 May 2022. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Yes. Results are posted in the registry (first posted 22 Jan 2020). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Rate of Changing Glucose Level (time frame: 3-5 days). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 May 2022; AzTrials last refreshed its copy on 8 Nov 2026.