This goal of this randomized controlled effectiveness trial is to compare the effectiveness of a peer-led health lifestyle intervention (Peer GLB) versus usual care services in supportive housing agencies in New York City and Philadelphia serving diverse clients with serious mental illness who are overweight or obese. The intervention follows the Group Lifestyle Balance curriculum derived from the Diabetes Prevention Program and that has been shown to help people achieve clinically significant weight loss (equal to or greater than 5% weight loss of initial weight). The intervention will be delivered by trained peer-specialists employed at the supportive housing agencies and supervised by the study team. Peer GLB is a 12-month group intervention that focuses helping people lose weight by improving people's diet and increasing their physical activity and consists of weekly core group sessions (3 mo.), bi-monthly transitional group sessions (3 mo.), and maintenance monthly sessions (6 mo.). We plan to enroll 300 clients with serious mental illness who are overweight/obese (BMI equal to or greater than 25) from our two supportive housing agencies. Clients will be randomized to either the Peer-led healthy lifestyle intervention or usual care conditions. The primary outcome for this study is achieving clinically significant weight loss (equal to or greater than 5% weight loss from baseline weight) at 12 and 18 months post randomization. The secondary outcomes for this study include overall reductions in weight, waist circumference, blood pressure, and improvements in physical activity, self-efficacy, recovery and health-related quality of life. Repeated assessments will be at baseline, 6, 12 and 18 month post randomization. Primary Hypothesis: Peer GLB participants will have a higher proportion of persons achieving clinically significant weight loss (equal to or greater than 5% weight loss) at 12 and 18 months than UC participants. Secondary Hypothesis: At 6, 12, and 18 months post-randomization, there will be significant reductions in average weight, waist circumference, blood pressure, and significant improvements in physical activity, self-efficacy, recovery, and health-related quality of life in Peer GLB compared to UC.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
314
The intervention follows the Group Lifestyle Balance curriculum derived from the Diabetes Prevention Program and The intervention will be delivered by trained peer-specialists employed at the supportive housing agencies and supervised by the study team. Peer GLB is a 12-month group intervention that focuses helping people lose weight by improving people's diet and increasing their physical activity and consists of weekly core group sessions (3 mo.), bi-monthly transitional group sessions (3 mo.), and maintenance monthly sessions (6 mo.).
The usual care condition encompasses the regular services offered at supportive housing agencies to help clients with their physical health and wellness.
Washington University in St. Louis
St Louis, Missouri, United States
Clinically Significant Weight Loss
Percentage of participants that achieve equal to or greater than 5% weight loss in lb from baseline at 12 and 18th months
Time frame: Baseline to 18 Months
Overall Reduction in Weight in lb From Baseline to 6, 12 and 18 Months
Weight (in pounds) was measured by a trained research assistant with a calibrated digital scale (participants wore indoor clothing without shoes).
Time frame: At study endpoint (18 months).
Overall Reduction in Waist Circumference Measures to the Nearest cm From Baseline to 6, 12 and 18 Months
Waist circumference measured by a trained research assistant to the nearest 0.1 cm with an anthropometric tape, in a horizontal plane 1 cm above the navel in light indoor clothing.
Time frame: At study endpoint (18 months).
Overall Reductions in Systolic Blood Pressure From Baseline, 6, 12 and 18 Months
Blood pressure assessed on the right arm of participants after they rest quietly in a seated position for at least 5 minutes, using a validated automated sphygmomanometer.
Time frame: At study endpoint (18 months).
Self-Efficacy for Exercise
Self-efficacy for exercise was measured with a three-item scale assessing a person's confidence that they can engage in physical activity. The scores from this scale range from 1 to 10 with higher scores indicating higher self-efficacy.
Time frame: At study endpoint (18 months).
Change From Baseline in Recovery Using the Recovery Assessment Scale (RAS).
The Recovery Assessment Scale is a 24-item measure that captures different aspects of recovery and produces a total recovery score ranging from 1 to 5 with higher scores indicating higher recovery.
Time frame: At study endpoint (18 months).
Health-related Quality of Life
The 12-Item Short-Form Health Survey (SF-12) was used to capture participants health-related quality of life. The Physical Composite Score derived from the SF-12 is an indicator of health-related quality of life with scores that range from 0 to 100 with higher scores indicating higher health-related quality of life.
Time frame: At study endpoint (18-months).
6-Minutes Walking Test
The 6-minutes Walking Test is an objective measure of functional exercise capacity that captures the distance (in meters) that participants walk at a normal pace along a flat and straight course for 6 minutes.
Time frame: At study endpoint (18-months).
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