Escalating Proportion of Weight-Loss Maintainers Via Modules Prior to Weight Loss
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Stanford University
- Enrollment
- 321
- Locations
- 1
- Primary Endpoint
- Proportion of participants who lose a clinically significant amount of initial body weight AND maintain it during the trial (i.e., Lose >=7% of their initial body weight from 0-12 months AND gain <=5 lbs from 12-36 months), assessed by clinic scales
Study Overview
Brief Summary
People with elevated blood pressure are at higher risk of having a heart attack or stroke than people with lower blood pressure. Losing a modest amount of weight-such as 15 or 20 pounds-can reduce the risk of having a heart attack or stroke. However, it can often be a struggle to maintain weight loss over time.
This study examines whether two behavioral weight-management programs can help people maintain weight loss over time. In this study, 346 adults will be randomly assigned (like flipping a coin) to one of the 12-month programs and followed for 36 months (i.e., 3 years) to see how their body weight may change.
Detailed Description
This randomized trial will test the efficacy and cost-effectiveness of novel modules administered prior to weight loss that are explicitly designed to enhance enjoyment of healthy lifestyle behaviors independent of any longer-term health effects, and thus escalate the proportion of individuals sustaining ≥7% weight loss over the long-term.
Overweight/obese individuals with elevated blood pressure will be randomized to one of two 12-month weight-management interventions (Fun First or Weight Watchers) and followed for 36 months. For Aim 1 (Primary outcome), we will test whether Fun First is more efficacious than Weight Watchers using a mediator-intervention interaction model with sufficient a priori statistical power for the interaction effect as well as the intervention and mediator main effects. The posited mediator assesses participants' change in enjoyment for four key healthy lifestyle behaviors (healthy eating, physical activity, weighing and self-nurturing) via online survey from 0-2 months. The primary outcome is the proportion of participants who lose a clinically significant amount of initial body weight and maintain it during the trial (i.e., lose >=7% of their initial body weight from 0-12 months and gain <=5 lbs from 12-36 months), assessed on clinic scales during in-person visits at the research clinic. Secondary outcomes include the proportion of individuals sustaining ≥7% weight loss over the trial assessed by digital cellular scales in participants' homes and participants' change in systolic blood pressure over the trial assessed at the research clinic.
For Aim 2 (Other pre-specified outcomes), we will test whether Fun First is more cost effective than Weight Watchers using both individual-level trial data and systems science modeling for long-term, population-level hypertension and cardiovascular disease incidence, health care and disability costs, and quality-adjusted life-years over the life course.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- Single (Outcomes Assessor)
Eligibility Criteria
- Ages
- 21 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •27 <= BMI < 45 kg/m2
- •Inclusion Criteria (Elevated Blood Pressure):
- •Systolic blood pressure between 120-159 mmHg OR diastolic blood pressure between 80-99 mmHg. Can be on >=1 antihypertensive medications if on stable dose for past 3 months
- •Systolic blood pressure <120 mmHg OR diastolic blood pressure <80 mmHg, if on stable dose of >=1 antihypertensive medications for past 3 months
Exclusion Criteria
- •(Blood Pressure):
- •Elevated blood pressure: Systolic blood pressure >=160 mmHg OR diastolic blood pressure >=100 mmHg
- •Exclusion Criteria (Underlying medical conditions/diseases):
- •Have had a heart attack, stroke, coronary heart disease, congestive heart failure, or angina
- •Have had coronary artery bypass surgery or cardiac catheterization such as percutaneous transluminal coronary angioplasty (PTCA), cath or stent placement
- •Have diabetes
- •Have medical contraindications to regular, unsupervised physical activity
- •Have moderate to severe asthma, or chronic obstructive pulmonary disorder (also called emphysema or chronic bronchitis)
- •Had cancer in the past 5 years (except non-melanoma skin cancer)
- •Currently under medical care for digestive issues, gastrointestinal distress, abdominal pain, or diarrhea
- •Had an organ transplant
- •Exclusion Criteria (Medications):
- •Not stable on medications over the past 3 months (e.g., cholesterol, thyroid, estrogen-hormone, psychiatric)
- •Currently taking prescription pain medications (e.g., Vicodin, Oxycodone)
- •Exclusion Criteria (Weight and diet related):
- •Have binge eating disorder or bulimic compensatory symptoms
- •Currently taking medication designed to lose weight
- •Have undergone weight-loss surgery (e.g., gastric bypass, lap band)
- •Have lost >10 pounds in the past 6 months
- •Currently in a weight-loss program (e.g., Jenny Craig)
- •Currently participating in any support groups that focus on weight or eating habits (e.g., Overeaters Anonymous)
- •Currently on a special diet for a serious health condition
- •Not willing to discontinue a special diet (e.g., Atkins)
- •Exclusion Criteria (Behavioral related):
- •Planning to move in the next year
- •Currently pregnant or planning to be within the next year
- •Participating in another research study
- •No regular access to a mobile phone and Internet
- •Not able to speak, read, or understand English for informed consent
- •Not willing to be randomized
- •Did not complete eligibility process successfully or in a timely manner
- •Staff discretion or judgement
- •Live within Bay Area (e.g., ~1-hour commute from Stanford research center)
Arms & Interventions
Fun First
If randomized to the 12-month Fun First program, participants will attend weekly interactive small-group sessions led by health coaches for 6 months, then receive monthly phone calls from coaches for 6 months. The first 6 months consists of a 2-month module promoting enjoyment of key maintenance skills before losing weight, followed by a 4-month behavioral weight-loss program.
Intervention: Fun First (Behavioral)
Weight Watchers
If randomized to the 12-month Weight Watchers program, participants are provided with study-paid access to weekly ongoing Weight Watchers meetings led by peer meeting leaders for 12 months at Weight Watchers locations convenient to participants as well as study-paid access to Weight Watchers personalized online tools. [The study and investigative team have no financial relationship with Weight Watchers].
Intervention: Weight Watchers (Behavioral)
Outcomes
Primary Outcomes
Proportion of participants who lose a clinically significant amount of initial body weight AND maintain it during the trial (i.e., Lose >=7% of their initial body weight from 0-12 months AND gain <=5 lbs from 12-36 months), assessed by clinic scales
Time Frame: Baseline to 36 months
Participants will be weighed during in-person visits at the research clinic at 0, 6, 12, 24, and 36 months
Secondary Outcomes
- Change in systolic blood pressure from 0-36 months(Baseline to 36 months)
- Proportion of participants who lose a clinically significant amount of initial body weight AND maintain it during the trial (Lose >=7% of their initial body weight from 0-12 months AND gain <=5 lbs from 12-36 months), assessed by cellular scales(Baseline to 36 months)
Investigators
Michaela Kiernan
Senior Research Scholar
Stanford University