Improving the Management of Obesity in Primary Care Practice (The Power-UP Trial) (Power-UP)

• ClinicalTrials.gov Identifier: NCT00826774
• Recruitment Status: Completed
• First Posted: January 22, 2009
• Last Update Posted: May 15, 2012
• Sponsor: University of Pennsylvania
• Collaborator: National Heart, Lung, and Blood Institute (NHLBI)
• Information provided by (Responsible Party): University of Pennsylvania

Tracking Information

• First Submitted Date: January 20, 2009
• First Posted Date: January 22, 2009
• Last Update Posted Date: May 15, 2012
• Study Start Date: January 2008
• Actual Primary Completion Date: February 2011 (Final data collection date for primary outcome measure)
• Current Primary Outcome Measures (submitted: January 21, 2009): Weight [ Time Frame: Measured at Month 24 ]
• Original Primary Outcome Measures: Same as current

Current Secondary Outcome Measures (submitted: January 21, 2009)

• Prevalence of the metabolic syndrome [ Time Frame: at 24 months ]
• Blood Pressure [ Time Frame: at 24 months ]
• Lipid levels [ Time Frame: at 24 months ]
• Sexual function [ Time Frame: at 24 months ]
• Mood [ Time Frame: at 24 months ]
• Homeostasis model assessment of insulin resistance (HOMA-IR) [ Time Frame: at 24 months ]

• Original Secondary Outcome Measures: Same as current
• Current Other Pre-specified Outcome Measures: Not Provided
• Original Other Pre-specified Outcome Measures: Not Provided

Descriptive Information

• Brief Title: Improving the Management of Obesity in Primary Care Practice (The Power-UP Trial)
• Official Title: Practice-based Opportunities for Weight Reduction Trial at University of Pennsylvania
• Brief Summary: The purpose of the study is to compare three methods of achieving weight loss in primary care medical practice. The study will be conducted in six primary care practices. Weight management will be provided to a total of 390 obese patients (who have 2 or more components of the metabolic syndrome) by their own primary care providers, in conjunction with the practices' auxiliary health professionals, including medical assistants.

Detailed Description

Obesity, defined by a body mass index (BMI) ≥ 30 kg/m2, affects more than 31% of American adults. Additionally, nearly one-quarter of U.S. adults meet criteria for the metabolic syndrome, a clustering of clinical signs (i.e., elevated waist circumference, blood pressure, glucose or triglycerides, decreased HDL cholesterol) that is associated with increased risk of cardiovascular death. Behavior modification programs and pharmacologic interventions for obesity typically result in an 8% to 10% loss of initial body weight. Losses of this magnitude are associated with clinically significant improvements in metabolic parameters among obese persons. The availability of traditional behavioral weight control programs, however, is limited as many of these programs are based in academic medical centers. Furthermore, pharmacotherapy is seldom covered by third-party payers. Thus, there are concerns about the accessibility of these interventions to the many obese individuals who could benefit from weight loss.

The purpose of the study is to improve the management of obesity in primary care practice, where obesity is commonly encountered but infrequently addressed. Three hundred and ninety persons at 6 primary care practices within the University of Pennsylvania Health System will be randomized to one of three 2-year interventions: Usual Care, Brief Lifestyle Counseling, or Enhanced Brief Lifestyle Counseling. After training in obesity management and intervention strategies, each site will enroll approximately 65 individuals with a BMI of 30-50 kg/m2 plus two or more components of the metabolic syndrome. Participants in the Usual Care condition (N=130) will receive educational materials plus quarterly visits with a primary care provider (PCP). Those in the Brief Lifestyle Counseling condition (N=130) will receive the same PCP visits, plus 26 brief counseling sessions with an auxiliary health care provider (e.g., a medical assistant), on-site or by phone. Participants in the Enhanced Brief Lifestyle Counseling condition (N=130) will additionally receive the same treatment as those in the Brief Lifestyle Counseling group, plus the choice of adjunctive meal replacements or pharmacotherapy.

Two-year changes in weight will be compared across groups. Participants who receive the Brief Lifestyle Counseling and the Enhanced Brief Lifestyle Counseling interventions are predicted to achieve greater weight loss than those who receive Usual Care. A secondary hypothesis is that participants in Enhanced Brief Lifestyle Counseling condition will lose significantly more weight at month 24 than participants in the Brief Lifestyle Counseling group. Secondary analysis will also compare changes in the metabolic syndrome (and its individual components), mood, quality of life, dietary intake, eating behavior, appetite, physical activity and sexual function, as well as cost-effectiveness, among the three conditions. Intervention protocols and study results will be disseminated to other health care providers and payers.

• Study Type: Interventional
• Study Phase: Phase 3
• Study Design: Allocation: Randomized; Intervention Model: Parallel Assignment; Masking: Single (Outcomes Assessor); Primary Purpose: Treatment

Condition

• Obesity
• Hypercholesterolemia
• Metabolic Syndrome
• Hypertension
• Diabetes

Intervention

• Behavioral: Usual Care
  Participants in this group will receive usual medical care, provided by their own primary care providers (PCPs). PCPs also will provide participants recommendations for weight management at quarterly-scheduled visits.
• Behavioral: Brief Lifestyle Counseling
  These participants, like those in the Usual Care group, will receive the same PCP visits, plus monthly brief counseling sessions with an auxiliary health care provider (e.g., a medical assistant), on-site or by phone.
• Behavioral: Enhanced Brief Lifestyle Counseling
  These participants will receive the same intervention as those in the Brief Lifestyle Counseling condition, including quarterly PCP visits and monthly sessions with a medical assistant who will instruct them in lifestyle modification. These individuals also will select, in consultation with their PCP, the use of either meal replacements or weight loss medication, to facilitate the induction and maintenance of weight loss

Study Arms

• Active Comparator: Ususal Care
  Intervention: Behavioral: Usual Care
• Experimental: Breif Lifestyle Counseling
  Intervention: Behavioral: Brief Lifestyle Counseling
• Experimental: Enhanced Brief Lifestyle Counseling
  Intervention: Behavioral: Enhanced Brief Lifestyle Counseling

Publications *

• Wadden TA, Volger S, Sarwer DB, Vetter ML, Tsai AG, Berkowitz RI, Kumanyika S, Schmitz KH, Diewald LK, Barg R, Chittams J, Moore RH. A two-year randomized trial of obesity treatment in primary care practice. N Engl J Med. 2011 Nov 24;365(21):1969-79. doi: 10.1056/NEJMoa1109220. Epub 2011 Nov 14.
• Yeh HC, Clark JM, Emmons KE, Moore RH, Bennett GG, Warner ET, Sarwer DB, Jerome GJ, Miller ER, Volger S, Louis TA, Wells B, Wadden TA, Colditz GA, Appel LJ. Independent but coordinated trials: insights from the practice-based Opportunities for Weight Reduction Trials Collaborative Research Group. Clin Trials. 2010 Aug;7(4):322-32. doi: 10.1177/1740774510374213. Epub 2010 Jun 23.

Recruitment Information

• Recruitment Status: Completed
• Actual Enrollment (submitted: January 21, 2009): 390
• Original Estimated Enrollment: Same as current
• Actual Study Completion Date: June 2011
• Actual Primary Completion Date: February 2011 (Final data collection date for primary outcome measure)

Eligibility Criteria

Inclusion Criteria:

• Age ≥ 21 years

  • BMI 30-50 kg/m2 and weight ≤ 400 lbs.

  • At least 2 of 5 criteria for metabolic syndrome

    • Elevated waist circumference (> 102 cm for men, > 88 cm for women)
    • Elevated blood pressure (≥ 130/85 mmHg)
    • Impaired fasting glucose (≥ 100 mg/dl)
    • Elevated triglycerides (≥ 150 mg/dl)
    • Low HDL cholesterol (< 40 for men, < 50 mg/dl for women)
  • Willing to change diet, physical activity and weight
  • Willing to accept randomization to each group
  • Able to give informed consent
  • Patient of participating PCP

Persons with the following conditions are eligible with PCP approval:

• Diabetes mellitus
• Prior CVD event > 6 months before randomization
• Stable CVD or peripheral vascular disease

Exclusion Criteria:

• Serious medical condition likely to hinder accurate measurement of weight, or for which weight loss is contraindicated, or which would cause weight loss (e.g., end-stage renal disease on dialysis, cancer diagnosis or treatment within 2 yrs)
• Prior or planned bariatric surgery
• Chronic use (at least past 6 months) of medications likely to cause weight gain or prevent weight loss (e.g. corticosteroids, lithium, olanzapine, risperidone, clozapine)
• Unintentional weight loss within 6 months of enrollment (≥ 5% of body weight)
• Intentional weight loss within 6 months of enrollment (≥ 5% of body weight)
• Pregnant or nursing within past 6 months
• Plans to relocate from the area within 2 years
• Another member of household is a study participant or staff in the trial
• Consumes > 14 alcoholic drinks per week
• Current use of illicit substances
• Psychiatric hospitalization in last year
• Psychiatric condition likely to impair adherence to treatment (e.g., schizophrenia)
• Blood pressure ≥ 160/100 mmHg; patient may be re-screened in 1 month
• Principal Investigator or PCP discretion

Sex/Gender

• Sexes Eligible for Study: All

• Ages: 21 Years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes
• Contacts: Contact information is only displayed when the study is recruiting subjects
• Listed Location Countries: Not Provided

Administrative Information

• NCT Number: NCT00826774
• Other Study ID Numbers: 805684; U01HL087072 ( U.S. NIH Grant/Contract )
• Has Data Monitoring Committee: Yes
• U.S. FDA-regulated Product: Not Provided
• IPD Sharing Statement: Not Provided
• Current Responsible Party: University of Pennsylvania
• Original Responsible Party: Thomas A. Wadden, University Of Pennsylvania
• Current Study Sponsor: University of Pennsylvania
• Original Study Sponsor: Same as current
• Collaborators: National Heart, Lung, and Blood Institute (NHLBI)

Investigators

• Principal Investigator: Thomas A Wadden, PhD; University of Pennsylvania

• PRS Account: University of Pennsylvania
• Verification Date: May 2012