A Trial of Two Diets for Weight and Diabetes Management (Two-for-2)

January 31, 2011 updated by: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
The purpose of this study is to determine whether a low-fat or low-glycemic load diet is more effective for controlling weight and blood glucose in persons with type 2 diabetes.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This research is a randomized controlled trial to compare long-term outcomes behavioral weight loss interventions that include either low-fat or low-glycemic load dietary instruction. Targets for energy intake and expenditure, and behavioral skills taught, are identical across the two diets. Additionally, both treatments include 20 weekly group sessions, followed by 10 every-other-week sessions. Participants are overweight and obese adults with type 2 diabetes. The primary outcomes are changes in weight and glycated hemoglobin. Those randomized to the low-glycemic load diet are expected to achieve greater weight losses and maintain better glycemic control at the end of treatment (i.e., week 40) and after 1 year of no-treatment follow-up (i.e., week 92).

Study Type

Interventional

Enrollment (Anticipated)

80

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 Locations

  • United States
    • Pennsylvania
      • Philadelphia, Pennsylvania, United States, 19104-3309
        • University of Pennsylvania, Center for Weight and Eating Disorders

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

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Type 2 Diabetes Mellitus
  • Body mass index (BMI) of 27 to 45 kg/m2 with weight </= 136 kg (300 lbs.
  • Capacity to provide written informed consent
  • Systolic blood pressure between 90 and 160 mm Hg, inclusive.
  • Diastolic blood pressure between 65 and 100 mm Hg, inclusive.
  • Resting heart rate between 65 and 90 beats per minute, inclusive.

Exclusion Criteria:

  • a recent (i.e., within 1 year) myocardial infarction
  • unstable angina
  • malignant arrhythmias
  • history of cerebrovascular, renal, or hepatic disease
  • history of seizures
  • protein wasting diseases (e.g., Cushing's syndrome)
  • uncontrolled hypertension (> 160/100 mm Hg)
  • type 1 diabetes
  • uncontrolled thyroid disease
  • pregnancy or lactation
  • electrolyte abnormalities
  • clinically significant psychosocial impairment (principally, major depression)
  • treatment with steroids

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: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 1
Low-Glycemic Load Diet
Behavioral: Lifestyle Modification
Weekly group therapy for 20 weeks, followed by bi-weekly group therapy for 20 weeks
Active Comparator: 2
Low-Fat Diet
Behavioral: Lifestyle Modification
Weekly group therapy for 20 weeks, followed by bi-weekly group therapy for 20 weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Percent change in weight
Time Frame: 92 weeks
92 weeks

Secondary Outcome Measures

Outcome Measure
Time Frame
Change in HbA1c
Time Frame: 92 weeks
92 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Collaborators

University of Pennsylvania

Investigators

  • Principal Investigator: Anthony N Fabricatore, Ph.D., University of Pennsylvania
  • Study Director: Thomas A Wadden, Ph.D., University of Pennsylvania
  • Study Director: Virginia A Stallings, M.D., Children's Hospital of Philadelphia
  • Study Director: Stanley Schwartz, M.D., University of Pennsylvania

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

July 1, 2005

Primary Completion (Actual)

May 1, 2010

Study Completion (Actual)

June 1, 2010

Study Registration Dates

First Submitted

August 5, 2008

First Submitted That Met QC Criteria

August 5, 2008

First Posted (Estimate)

August 7, 2008

Study Record Updates

Last Update Posted (Estimate)

February 1, 2011

Last Update Submitted That Met QC Criteria

January 31, 2011

Last Verified

January 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • K23 DK70777 (completed)
  • K23DK070777 (U.S. NIH Grant/Contract)

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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