- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06134986
Intermittent Fasting in Adults With Type 1 Diabetes
November 27, 2023 updated by: Krista Varady, University of Illinois at Chicago
The majority of adults with type 1 diabetes (T1DM) have either overweight or obesity.
As such, dietary management has been recommended as an adjunct to insulin treatment to improve glycemic control and facilitate weight loss in patients with T1DM.
Daily calorie restriction (CR) is the main diet prescribed to patients with T1DM for weight loss.
However, many patients find it difficult to adhere to CR because calorie intake must be vigilantly monitored every day.
In light of these problems with CR, another approach that limits timing of food intake, instead of number of calories consumed, has been developed.
This diet is called "time restricted eating" (TRE) and involves confining the period of food intake to 6-8 h per day.
TRE allows individuals to self-select foods and eat ad libitum during a large part of the day, which greatly increases compliance to these protocols.
The simplicity of TRE, its accommodation of dietary preferences, and associated weight loss may translate to improved glycemic measures in patients with T1DM.
The present study will be the first randomized controlled trial to compare the effect of TRE versus CR for weight management and improved glycemic control in adults with obesity and T1DM.
Study Overview
Status
Recruiting
Conditions
Intervention / Treatment
Study Type
Interventional
Enrollment (Estimated)
60
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Krista Varady, PhD
- Phone Number: 3129967897
- Email: varady@uic.edu
Study Locations
-
-
Illinois
-
Chicago, Illinois, United States, 60612
- Recruiting
- University of Illinois Chicago
-
Contact:
- Krista Varady, PhD
- Phone Number: 312-996-7897
- Email: varady@uic.edu
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
- Adult
- Older Adult
Accepts Healthy Volunteers
No
Description
Inclusion Criteria:
- Age between 18 to 75 years old
- BMI between 25 and 50 kg/m2
- Previously diagnosed with T1DM and currently using insulin
- HbA1c: 6.5-9.5% (regardless of medication use)
- On either multiple daily doses of insulin (MDI) program or using an insulin pump (with or without closed loop feature) 11
- Active prescription for glucagon
Exclusion Criteria:
- Previously diagnosed with T2DM
- Have a history of eating disorders (anorexia, bulimia, or binge eating disorder)
- Are not weight stable for 3 months prior to the beginning of study (weight gain or loss > 4 kg)
- Are not able to keep a food diary for 7 consecutive days during screening
- Are eating less than a 10-hour window at baseline
- Are pregnant, or trying to become pregnant
- Are night shift workers
- History of severe hypoglycemia defined as requiring help from others, needed to use emergency glucagon administration in the past 6 months.
- Other significant medical history including heart failure, unstable coronary artery disease, chronic obstructive pulmonary disease requiring oxygen, cirrhosis, active cancer, history of stroke, end stage renal disease
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Daily calorie restriction (CR)
25% energy restriction every day Diet counseling provided
|
25% energy restriction every day Diet counseling provided
|
No Intervention: Control
Ad libitum food intake, eating over more than 10 hours per day
|
|
Experimental: Time restricted eating (TRE)
8-h eating window Ad libitum food intake from 12-8 pm every day Fasting from 8-12 pm every day (16-h fast)
|
8-h eating window Ad libitum food intake from 12-8 pm every day Fasting from 8-12 pm every day (16-h fast)
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in percent body weight
Time Frame: Measured at baseline and month 6
|
Measured by an electronic scale
|
Measured at baseline and month 6
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in HbA1c
Time Frame: Measured at baseline and month 6
|
Measured by outside lab (Medstar, IN)
|
Measured at baseline and month 6
|
Change in total time in euglycemic range
Time Frame: Measured at baseline and month 6
|
Measured by continuous glucose monitor (CGM)
|
Measured at baseline and month 6
|
Change in mean glucose level
Time Frame: Measured at baseline and month 6
|
Measured by continuous glucose monitor (CGM)
|
Measured at baseline and month 6
|
Change in standard deviation of glucose level
Time Frame: Measured at baseline and month 6
|
Measured by continuous glucose monitor (CGM)
|
Measured at baseline and month 6
|
Change fasting glucose
Time Frame: Measured at baseline and month 6
|
Measured by outside lab (Medstar, IN)
|
Measured at baseline and month 6
|
Change in fat mass, lean mass, visceral fat mass
Time Frame: Measured at baseline and month 6
|
Measured by DXA
|
Measured at baseline and month 6
|
Change in waist circumference
Time Frame: Measured at baseline and month 6
|
Measured by measuring tape
|
Measured at baseline and month 6
|
Change in body mass index (BMI)
Time Frame: Measured at baseline and month 6
|
Calculated as kg/meter squared
|
Measured at baseline and month 6
|
Change in plasma lipids (total cholesterol, LDL cholesterol, HDL cholesterol, triglycerides)
Time Frame: Measured at baseline and month 6
|
Measured by outside lab (Medstar, IN)
|
Measured at baseline and month 6
|
Change in systolic and diastolic blood pressure
Time Frame: Measured at baseline and month 6
|
Measured by blood pressure cuff
|
Measured at baseline and month 6
|
Change in heart rate
Time Frame: Measured at baseline and month 6
|
Measured by blood pressure cuff
|
Measured at baseline and month 6
|
Change in energy and nutrient intake
Time Frame: Measured at baseline and month 6
|
Measured by 7-day food record
|
Measured at baseline and month 6
|
Change in medication effect score (MES)
Time Frame: Measured at baseline and month 6
|
Measured by survey.
Total score 0-100.
Lower scores indicate less medication used, higher scores indicate more medication used.
|
Measured at baseline and month 6
|
Change in coefficient of variation of glucose level
Time Frame: Measured at baseline and month 6
|
Measured by continuous glucose monitor (CGM)
|
Measured at baseline and month 6
|
Change in absolute body weight
Time Frame: Measured at baseline and month 6
|
Measured by an electronic scale
|
Measured at baseline and month 6
|
Change in dietary adherence
Time Frame: Measured at baseline and month 6
|
Measured by 7-day food record and adherence log
|
Measured at baseline and month 6
|
Change in physical activity (steps/d)
Time Frame: Measured at baseline and month 6
|
Measured by activity monitor
|
Measured at baseline and month 6
|
Adverse events
Time Frame: Measured at baseline and month 6
|
Measured by adverse events survey
|
Measured at baseline and month 6
|
Change in ketones
Time Frame: Measured at baseline and month 6
|
Measured by ketone meter
|
Measured at baseline and month 6
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Krista Varady, PhD, University of Illinois Chicago
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
November 20, 2023
Primary Completion (Estimated)
September 1, 2025
Study Completion (Estimated)
September 1, 2025
Study Registration Dates
First Submitted
November 11, 2023
First Submitted That Met QC Criteria
November 11, 2023
First Posted (Actual)
November 18, 2023
Study Record Updates
Last Update Posted (Actual)
November 28, 2023
Last Update Submitted That Met QC Criteria
November 27, 2023
Last Verified
November 1, 2023
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2023-0678
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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