We are updating the design of this site. Learn more.
Show more
ClinicalTrials.gov
ClinicalTrials.gov Menu

Evaluation of Group Lifestyle Balance Maintenance Strategies

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00869609
First Posted: March 26, 2009
Last Update Posted: June 24, 2016
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Collaborator:
Robert C. Atkins Foundation
Information provided by (Responsible Party):
Trevor J. Orchard, University of Pittsburgh
  Purpose

Heart disease is a leading cause of death in people in the United States. It is a major problem for those with diabetes. Conditions called the metabolic syndrome and pre-diabetes increase risk for diabetes and heart disease. The metabolic syndrome is a group of disorders that occur at the same time. Overall, one in four American adults has the metabolic syndrome. It is more common in people over the age of 40. The metabolic syndrome includes: 1) large waist size, 2) high triglycerides, 3) low HDL cholesterol, 4) high blood pressure and 5) high fasting blood sugar. People with the metabolic syndrome have at least three of these five risk factors. Pre-diabetes is considered to be present in those with high fasting blood sugar levels below the diabetes range.

Research has shown that type 2 diabetes and the metabolic syndrome may be prevented or delayed by making lifestyle changes. It is not known what will most help people continue these healthy changes over time. The purpose of this study is to look at ways to help people continue the healthy lifestyle changes they have made while taking part in a diabetes prevention program called Group Lifestyle Balance (GLB).


Condition Intervention
Diabetes Behavioral: GLB Traditional Maintenance (TM) Behavioral: GLB-Carb-focused Maintenance (CF)

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Evaluation of Group Lifestyle Balance Maintenance Strategies

Further study details as provided by Trevor J. Orchard, University of Pittsburgh:

Primary Outcome Measures:
  • Change in Weight [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    Weight was measured twice without shoes with the average computed; participants were asked to remove their shoes at each measure.


Secondary Outcome Measures:
  • Change in Total Cholesterol [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    Total cholesterol was measured after at least an eight-hour fast using the Cholestech LDX System by a certified research assistant.

  • Change in HDL Cholesterol [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    High-density lipoprotein (HDL) cholesterol was measured after at least an eight-hour fast using the Cholestech LDX System by a certified research assistant.

  • Change in LDL Cholesterol [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    Low-density lipoprotein (LDL) cholesterol was measured after at least an eight-hour fast using the Cholestech LDX System by a certified research assistant.

  • Change in Triglycerides [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    Triglycerides were measured after at least an eight-hour fast using the Cholestech LDX System by a certified research assistant.

  • Change in Fasting Glucose [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    Fasting plasma glucose was measured after at least an eight-hour fast using the Cholestech LDX System by a certified research assistant.

  • Change in Glycosylated Hemoglobin A1c (HbA1c) [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    Collected via venous blood draw, the HbA1c level reflects glucose concentration over the previous period (approximately 8-12 weeks, depending on the individual) and provides an indication of long-term glycemic control.

  • Change in Systolic Blood Pressure [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    Blood pressure was measured in a sitting position in the right arm after resting for five minutes. First appearance and last heard (phase V) Korotkoff's sounds were used to define the pressure readings; the measures were repeated twice with a thirty second wait between each reading.

  • Change in Diastolic Blood Pressure [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    Blood pressure was measured in a sitting position in the right arm after resting for five minutes. First appearance and last heard (phase V) Korotkoff's sounds were used to define the pressure readings; the measures were repeated twice with a thirty second wait between each reading.

  • Change in Waist Circumference [ Time Frame: Measured at 8 months post intervention and 4 months post-randomization to maintenance group ]
    Waist circumference was measured at the midpoint between the lower rib margin and the iliac crest; the measurement was repeated twice and the average computed.


Enrollment: 60
Study Start Date: March 2009
Study Completion Date: August 2010
Primary Completion Date: August 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: GLB Traditional Maintenance (TM)
Group Lifestyle Balance (GLB) program Traditional Maintenance: After completion of the GLB 12 core sessions, participants who are randomly assigned to GLB program Traditional Maintenance (TM) will attend monthly maintenance sessions to assist them in maintaining the healthy lifestyle they have adopted during the 12 Core sessions.
Behavioral: GLB Traditional Maintenance (TM)
After completion of the GLB 12 core sessions, participants will be randomly assigned to either Group Lifestyle Balance (GLB) program traditional maintenance or GLB Carb-focused maintenance. Participants will attend monthly maintenance sessions to assist them in maintaining the healthy lifestyle they have adopted during the 12 Core sessions. In addition, they will receive information on healthy carbohydrate intake and hunger management.
Active Comparator: GLB-Carb-focused Maintenance (CF)
Group Lifestyle Balance (GLB) program Carb-focused Maintenance: After completion of the GLB 12 core sessions, participants randomly assigned to GLB Carb-focused Maintenance (CF) will attend monthly maintenance sessions to assist them in maintaining the healthy lifestyle they have adopted during the 12 Core sessions. In addition, they will receive information regarding healthy carbohydrate intake and hunger management.
Behavioral: GLB-Carb-focused Maintenance (CF)
After completion of the GLB 12 core sessions, participants will be randomly assigned to either Group Lifestyle Balance (GLB) program traditional maintenance or GLB Carb-focused maintenance. GLB-CF participants will attend monthly maintenance sessions to assist them in maintaining the healthy lifestyle they have adopted during the 12 Core sessions. In addition, they will receive information on healthy carbohydrate intake and hunger management.

Detailed Description:

Objective: To determine the effectiveness of the Group Lifestyle Balance (GLB) program with an added maintenance component focusing on carbohydrate reduction and hunger management when compared to the GLB program with traditional maintenance.

Research Design and Methods: The original Diabetes Prevention Program intervention was modified from a 16 session individual intervention to a 12 session group-based program called Group Lifestyle Balance (GLB). The Diabetes Prevention Support Center (DPSC) has been created to oversee the implementation of diabetes prevention and CVD risk reduction in various community settings. GLB is a 12-session group based program that focuses on a low fat diet, weight loss and physical activity. This evidence-based intervention is directed at those with pre-diabetes and/or the metabolic syndrome. A monthly maintenance component will be added which provides support in assisting individuals who have completed the 12-session course in the maintenance of healthy lifestyle changes.

The efficacy (in terms of weight reduction) of an added maintenance component focusing on carbohydrate reduction and hunger management will be compared to traditional maintenance. Participants will be randomly assigned to either GLB traditional maintenance (GLB-TM) or GLB and carbohydrate reduced maintenance (GLB-CRM). There will be two groups of approximately 15 subjects in each intervention assignment, for a total of approximately 30 subjects per intervention group and approximately 60 subjects taking part overall. Efficacy in both groups will be assessed by pre and post-intervention measures of diet (weight loss) and physical activity (the keystones of the intervention), as well as the achievement of the two goals: a 7% weight loss by the end of 6 months and 150 minutes of physical activity per week. Secondary outcomes to be evaluated include the reduction of global CVD risk, as assessed by the Framingham Score, the presence of metabolic syndrome (NCEP ATP III), and a fall in blood sugar. Repeat measures will be obtained at six months and one year for further evaluation and comparison.

  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

Non-diabetic patients with metabolic syndrome AND/OR pre-diabetes are eligible for this project based on the following criteria:

  1. Metabolic Syndrome:

    Patients with BMI ≥ 25 kg/m2, with at least 3 of the following risk factors for metabolic syndrome:

    • Waist circumference (>40 inches men, >35 inches women)
    • Blood pressure ≥130 mmHg (systolic) or ≥85 mmHg (diastolic) OR history of diagnosed hypertension
    • Low HDL level (<40mg/dL men, <50 mg/dL women)
    • Elevated triglyceride level ≥150 mg/dL
    • Fasting glucose ≥100mg/dL and <126mg/dL
  2. Pre-diabetes:

Patients with a BMI ≥25 kg/m2 and pre-diabetes (fasting glucose ≥100 mg/dL and <126mg/dL)

All measures should have been taken within one year of enrollment into the study. A permission for physical activity form must be signed by the participant's physician in order to take part in the study.

Exclusion Criteria:

  • Previous diabetes or diabetes diagnosed as a result of the screening
  • Age <18 years old
  • Women who are currently (or within past 6-weeks) pregnant or lactating
  • Any patient deemed by their physician not to be a candidate
  • Any patient planning to leave the area before the end of the GILS
  • Any patient who is unable to provide informed consent
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00869609


Locations
United States, Pennsylvania
Diabetes Prevention Support Center
Pittsburgh, Pennsylvania, United States, 15213
Sponsors and Collaborators
University of Pittsburgh
Robert C. Atkins Foundation
Investigators
Principal Investigator: Trevor J Orchard, MD University of Pittsburgh
  More Information

Additional Information:
Responsible Party: Trevor J. Orchard, Professor, University of Pittsburgh
ClinicalTrials.gov Identifier: NCT00869609     History of Changes
Other Study ID Numbers: PRO08120047
First Submitted: March 24, 2009
First Posted: March 26, 2009
Results First Submitted: January 11, 2016
Results First Posted: February 9, 2016
Last Update Posted: June 24, 2016
Last Verified: May 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Keywords provided by Trevor J. Orchard, University of Pittsburgh:
Diabetes Prevention
CVD Risk Reduction
Lifestyle Intervention