- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02467881
Physical Activity and Sedentary Behavior Change; Impact on Lifestyle
Physical Activity and Sedentary Behavior Change; Impact on Lifestyle Intervention Effects for Diabetes Translation
Study Overview
Status
Conditions
Detailed Description
Translation efforts based upon the successful Diabetes Prevention Program (DPP) have shown that this behavioral lifestyle intervention model is effective in a variety of diverse community settings. Despite the fact that physical activity is a key part of the DPP lifestyle intervention as one of the two intervention goals, activity change in the DPP, and/or the resulting translation studies modeled after it, has not been adequately verified with an accurate objective measure. In addition, previous research has shown that, in many subgroups of the general population, moderate and vigorous physical activity is non-existent. Individuals with activity only at the low end of the intensity spectrum may have a difficult time increasing their levels of moderate+ intensity physical activity for various reasons such as limited function or lack of motivation. For these individuals, interventions with a movement goal of increasing planned bouts of moderate intensity activity may not be as effective and therefore not as beneficial as interventions with a movement goal of decreasing time spent sitting.
The purpose of this proposal is to understand the impact of movement, specifically physical activity and sitting time, in a DPP-adapted community lifestyle intervention, Group Lifestyle Balance (GLB).
Aim 1: To determine if the GLB lifestyle intervention, shown to be effective in translation efforts in decreasing weight and increasing self-reported activity, has significant changes in physical activity levels determined by a validated objective measure, the accelerometer. It is hypothesized that participants randomized to the conventional lifestyle intervention arm (GLB-MOD) will have significant improvements in our primary endpoints of weight and physical activity (measured objectively) compared to a delayed-intervention control at 6 months and will have reductions in several secondary outcome measures (fasting glucose, insulin, blood pressure, waist, lipids, physical function, and quality of life).
Aim 2: To determine if a lifestyle intervention program similar to the one described above, with the only change being that the activity focus is now replaced with an inactivity focus (GLB-SED), is also effective. It is hypothesized that participants randomized to GLB-SED will have a significant improvement in the primary endpoints of weight and decreased inactivity (measured objectively) compared to a delayed-intervention control at 6 months and will have significant reductions in several of the secondary endpoints (fasting glucose, insulin, blood pressure, waist circumference, lipids, physical function, quality of life).
Secondary Aims: To examine the pre-post change in participants for weight, physical activity (objective and subjective), and sedentary time from baseline to 6 and 12 months of intervention for each randomized arm and to understand the inter-relationships of these behavioral factors over time. It is hypothesized that those GLB-MOD participants who achieve significant weight loss will also have significant increases in their moderate+ intensity activity levels. Similarly, we hypothesize those GLB-SED participants who achieve significant weight loss will also have significant decreases in the amount of time they spent sedentary/sitting. An estimate of the difference in participant cost between the two versions of the lifestyle intervention programs will also be determined.
Aim #1 addresses an important remaining gap in the prevention literature; does objectively measured activity improve as a result of the existing intervention that is being used in DPP-based translation efforts and does this change in activity have an impact on weight change? Aim #2 examines the impact of replacing the conventional physical activity goal of increasing planned and relatively brief bouts of moderate physical activity with one focusing on decreasing sedentary time within the framework of a successful translation lifestyle intervention adapted from the DPP, the Group Lifestyle Balance (GLB) program.
The study design is a prospective, six month delayed-control intervention in which 321 subjects (age 50 and older with a BMI of ≥24 kg/m2 and with prediabetes and/or metabolic syndrome) will be recruited from community centers and randomly assigned to one of three groups: the standard GLB program which includes the conventional moderate activity goal (GLB-MOD), the GLB program with a focus on decreasing sedentary behavior (GLB-SED), or delayed intervention. Subjects assigned to GLB-MOD and GLB-SED will each, separately be compared at 6 months to the delayed-control group after which time, the delayed group will be randomly assigned to either GLB-MOD or GLB-SED. Participants will complete baseline, 6, and 12 month assessment visits. Change in weight, objectively measured activity, and time spent sedentary are the primary outcomes with secondary outcomes including change in self-reported physical activity, HbA1c, fasting glucose, lipids, blood pressure, waist circumference, quality of life and physical function.
It is hypothesized that physical activity assessed by accelerometry in GLB-MOD will significantly increase (mostly moderate intense activity) and that there will be a significant decrease in weight, which will partly be related to change in activity levels. The 2nd hypothesis is that the GLB-SED intervention will significantly decrease time spent sitting as measured by accelerometry and that this change will also be related to a significant decrease in weight. The information that will be gained from this entire effort is important, innovative, and will allow us to obtain a complete and accurate understanding of both ends of the physical activity/inactivity spectrum and their impact in community prevention intervention programs. If shown to be effective, the innovative, modified sedentary-focused translation intervention program would provide a valuable future translation option.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Pennsylvania
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Pittsburgh, Pennsylvania, United States, 15213
- University of Pittsburgh, Epidemiology Department
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
Individuals attending screening who are found to have prediabetes AND/OR the metabolic syndrome are eligible to participate in the intervention. Pre-diabetes is defined as having a fasting glucose >100 mg/dL and <126mg/dL and/or a hemoglobin A1C of 5.7%-6.4%.
Metabolic syndrome is defined as having at least 3 of the 5 following risk factors:
- 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
Individuals attending screening with hyperlipidemia plus one additional component of the metabolic syndrome are also eligible.
Exclusion Criteria:
Individuals who are identified as having diabetes as a result of the screening are not eligible. All individuals enrolled in the study should have at least 6th grade English reading/writing ability. Physician approval will be requested to clear for the activity portion of the program.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
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Active Comparator: Physical Activity Increase (GLB-MOD)
Participants randomized to this arm will follow the traditional GLB program with an activity goal of 150 minutes per week of moderately intense physical activity similar to a brisk walk.
Progression of the activity goal each week is slow and safe with increases of no more than 30 minutes per week.
Participants are requested to try and achieve 20-30 minutes per day of moderate activity but, to allow for flexibility, that amount can be split into 10 minute increments.
Self-reported monitoring for this group includes keeping track of weight, daily food intake as well the number of minutes each day spent being active as part of their planned activity goal.
This is all recorded in the self-monitoring keeping track book.
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The Group Lifestyle Balance (GLB) program was adapted from the original DPP lifestyle intervention. As in the original DPP lifestyle program, the GLB goals are to achieve and maintain a 7% weight loss, and to safely and progressively increase physical activity to 150 minutes/week of moderately intense physical activity similar to a brisk walk. The curriculum will be administered in intervention groups with an average of 10-15 individuals per group; sessions will be conducted by trained coaches, with participants attending 22 sessions over one year. The two intervention arms will only differ in the aerobic activity portion of the intervention, which is covered in sessions #4, #10 and 19 as well as participant record keeping and goal setting in regards to activity/inactivity progression. |
Active Comparator: Sedentary Time Decrease (GLB-SED)
The GLB curriculum will be adapted to direct participants to decrease the time they spend sitting in a day rather than to increase moderate+ physical activity as is the case in the current GLB program.
In order for the participant to become aware of how much time they spend sitting and where most of their sitting time occurs, they will fill out a "7 Day Sedentary Diary" that consists of daily entry of time spent sitting over the course of one week.
Participants will be asked to eliminate a 45 minute sitting bout in a day with non-sitting activity.
They will initially be asked to eliminate 45 minutes of sitting for two days in that week.
This will increase one day a week until 7 days in a week are met.
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As in the original DPP, the GLB goal for weight is to achieve and maintain a 7% weight loss. For this intervention arm, instead of focusing on increasing moderate physical activity, the GLB curriculum will be adapted to address decreasing sitting time. Participants will have a goal of decreasing sitting time by 45 minutes/day. The curriculum will be administered in intervention groups with an average of 10-15 individuals per group; sessions will be conducted by trained coaches, with participants attending 22 sessions over one year. The two intervention arms will only differ in the aerobic activity portion of the intervention, which is covered in sessions #4, #10 and 19 as well as participant record keeping and goal setting in regards to activity/inactivity progression. |
Other: 6-month delayed (DELAYED)
Those assigned to the DELAYED group at baseline will wait for 6 months to begin intervention.
During the delayed time period, these participants will receive periodic health information newsletters.
At the end of 6 months, the DELAYED participants will be randomly assigned to GLB-MOD or GLB-SED intervention, and will begin their intervention program at that time.
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Individuals assigned to 6 month delay will wait for 6 months from baseline to be randomly assigned to one of the two interventions and will begin intervention at that time.
During the waiting period they will receive health information newsletters.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
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BMI (Body Mass Index)
Time Frame: Change in BMI between Baseline and 6 months
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BMI will be calculated as average weight divided by average height squared (kg/m2).
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Change in BMI between Baseline and 6 months
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BMI (Body Mass Index)
Time Frame: Change in BMI between Baseline and 12 months
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BMI will be calculated as average weight divided by average height squared (kg/m2).
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Change in BMI between Baseline and 12 months
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Actigraph Accelerometry
Time Frame: Change in Physical Activity Level between Baseline and 6 months
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Physical activity level objectively measured using Actigraph Accelerometry.
This will be worn on the waist and will passively record physical activity and sedentary behavior.
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Change in Physical Activity Level between Baseline and 6 months
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Actigraph Accelerometry
Time Frame: Change in Physical Activity Level between Baseline and 12 months
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Physical activity level objectively measured using Actigraph Accelerometry.
This will be worn on the waist and will passively record physical activity and sedentary behavior.
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Change in Physical Activity Level between Baseline and 12 months
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
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Gait Speed
Time Frame: Change in Gait Speed between Baseline and 6 months
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Gait Speed (m/s over 4 m) will be used to measure change in physical function.
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Change in Gait Speed between Baseline and 6 months
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Gait Speed
Time Frame: Change in Gait Speed between Baseline and 12 months
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Gait Speed (m/s over 4 m) will be used to measure change in physical function.
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Change in Gait Speed between Baseline and 12 months
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Fasting glucose test
Time Frame: Change in Fasting glucose between Baseline and 6 months
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Blood sample
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Change in Fasting glucose between Baseline and 6 months
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Fasting glucose test
Time Frame: Change in Fasting glucose between Baseline and 12 months
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Blood sample
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Change in Fasting glucose between Baseline and 12 months
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Fasting lipid profile test
Time Frame: Change in Fasting lipid profile between Baseline and 6 months
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Blood sample
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Change in Fasting lipid profile between Baseline and 6 months
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Fasting lipid profile test
Time Frame: Change in Fasting lipid profile between Baseline and 12 months
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Blood sample
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Change in Fasting lipid profile between Baseline and 12 months
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Fasting Insulin test
Time Frame: Change in Fasting Insulin between Baseline and 6 months
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Blood test
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Change in Fasting Insulin between Baseline and 6 months
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Fasting Insulin test
Time Frame: Change in Fasting Insulin between Baseline and 12 months
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Blood test
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Change in Fasting Insulin between Baseline and 12 months
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Hemoglobin A1c test
Time Frame: Change in Hemoglobin A1c between Baseline an 6 months
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Blood sample
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Change in Hemoglobin A1c between Baseline an 6 months
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Hemoglobin A1c test
Time Frame: Change in Hemoglobin A1c between Baseline and 12 months
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Blood sample
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Change in Hemoglobin A1c between Baseline and 12 months
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Blood pressure
Time Frame: Change in Blood Pressure between Baseline and 6 months
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Change in Blood Pressure between Baseline and 6 months
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Blood pressure
Time Frame: Change in Blood Pressure between Baseline and 12 months
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Change in Blood Pressure between Baseline and 12 months
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Modifiable Activity Questionnaire
Time Frame: Change in self-reported Modifiable Activity Questionnaire between Baseline and 6 months
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The Modified Activity Questionnaire is a self-report of physical activity level and sedentary behavior.
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Change in self-reported Modifiable Activity Questionnaire between Baseline and 6 months
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Modifiable Activity Questionnaire
Time Frame: Change in self-reported Modifiable Activity Questionnaire between Baseline and 12 months
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The Modified Activity Questionnaire is a self-report of physical activity level and sedentary behavior.
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Change in self-reported Modifiable Activity Questionnaire between Baseline and 12 months
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EQ-5D Quality of Life Survey
Time Frame: Change in Quality of Life between Baseline and 6 months
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The EQ-5D quality of life survey measures health status and outcomes.
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Change in Quality of Life between Baseline and 6 months
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EQ-5D Quality of Life Survey
Time Frame: Change in Quality of Life between Baseline and 12 months
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The EQ-5D quality of life survey measures health status and outcomes.
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Change in Quality of Life between Baseline and 12 months
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Andrea M Kriska, PhD, University of Pittsburgh
Publications and helpful links
General Publications
- Knowler WC, Barrett-Connor E, Fowler SE, Hamman RF, Lachin JM, Walker EA, Nathan DM; Diabetes Prevention Program Research Group. Reduction in the incidence of type 2 diabetes with lifestyle intervention or metformin. N Engl J Med. 2002 Feb 7;346(6):393-403. doi: 10.1056/NEJMoa012512.
- Devaraj SM, Napoleone JM, Miller RG, Rockette-Wagner B, Arena VC, Mitchell-Miland C, Saad MB, Kriska AM. The role of Sociodemographic factors on goal achievement in a community-based diabetes prevention program behavioral lifestyle intervention. BMC Public Health. 2021 Oct 2;21(1):1783. doi: 10.1186/s12889-021-11844-z.
- Orchard TJ, Temprosa M, Goldberg R, Haffner S, Ratner R, Marcovina S, Fowler S; Diabetes Prevention Program Research Group. The effect of metformin and intensive lifestyle intervention on the metabolic syndrome: the Diabetes Prevention Program randomized trial. Ann Intern Med. 2005 Apr 19;142(8):611-9. doi: 10.7326/0003-4819-142-8-200504190-00009.
- Ratner R, Goldberg R, Haffner S, Marcovina S, Orchard T, Fowler S, Temprosa M; Diabetes Prevention Program Research Group. Impact of intensive lifestyle and metformin therapy on cardiovascular disease risk factors in the diabetes prevention program. Diabetes Care. 2005 Apr;28(4):888-94. doi: 10.2337/diacare.28.4.888.
- Kramer MK, Kriska AM, Venditti EM, Miller RG, Brooks MM, Burke LE, Siminerio LM, Solano FX, Orchard TJ. Translating the Diabetes Prevention Program: a comprehensive model for prevention training and program delivery. Am J Prev Med. 2009 Dec;37(6):505-11. doi: 10.1016/j.amepre.2009.07.020.
- Kriska AM, Edelstein SL, Hamman RF, Otto A, Bray GA, Mayer-Davis EJ, Wing RR, Horton ES, Haffner SM, Regensteiner JG. Physical activity in individuals at risk for diabetes: Diabetes Prevention Program. Med Sci Sports Exerc. 2006 May;38(5):826-32. doi: 10.1249/01.mss.0000218138.91812.f9.
- Wilmot EG, Davies MJ, Edwardson CL, Gorely T, Khunti K, Nimmo M, Yates T, Biddle SJ. Rationale and study design for a randomised controlled trial to reduce sedentary time in adults at risk of type 2 diabetes mellitus: project stand (Sedentary Time ANd diabetes). BMC Public Health. 2011 Dec 8;11:908. doi: 10.1186/1471-2458-11-908.
- Steeves JA, Bassett DR, Fitzhugh EC, Raynor HA, Thompson DL. Can sedentary behavior be made more active? A randomized pilot study of TV commercial stepping versus walking. Int J Behav Nutr Phys Act. 2012 Aug 6;9:95. doi: 10.1186/1479-5868-9-95.
Study record dates
Study Major Dates
Study Start
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimated)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- STUDY20050105
- R18DK100933-02 (U.S. NIH Grant/Contract)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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