title: A two-year randomized trial of obesity treatment in primary care practice.
abstract: BACKGROUND
  Calls for primary care providers (PCPs) to offer obese patients behavioral weight-loss counseling have not been accompanied by adequate guidance on how such care could be delivered. This randomized trial compared weight loss during a 2-year period in response to three lifestyle interventions, all delivered by PCPs in collaboration with auxiliary health professionals (lifestyle coaches) in their practices.
  
  
  METHODS
  We randomly assigned 390 obese adults in six primary care practices to one of three types of intervention: usual care, consisting of quarterly PCP visits that included education about weight management; brief lifestyle counseling, consisting of quarterly PCP visits combined with brief monthly sessions with lifestyle coaches who instructed participants about behavioral weight control; or enhanced brief lifestyle counseling, which provided the same care as described for the previous intervention but included meal replacements or weight-loss medication (orlistat or sibutramine), chosen by the participants in consultation with the PCPs, to potentially increase weight loss.
  
  
  RESULTS
  Of the 390 participants, 86% completed the 2-year trial, at which time, the mean (±SE) weight loss with usual care, brief lifestyle counseling, and enhanced brief lifestyle counseling was 1.7±0.7, 2.9±0.7, and 4.6±0.7 kg, respectively. Initial weight decreased at least 5% in 21.5%, 26.0%, and 34.9% of the participants in the three groups, respectively. Enhanced lifestyle counseling was superior to usual care on both these measures of success (P=0.003 and P=0.02, respectively), with no other significant differences among the groups. The benefits of enhanced lifestyle counseling remained even after participants given sibutramine were excluded from the analyses. There were no significant differences between the intervention groups in the occurrence of serious adverse events.
  
  
  CONCLUSIONS
  Enhanced weight-loss counseling helps about one third of obese patients achieve long-term, clinically meaningful weight loss. (Funded by the National Heart, Lung, and Blood Institute; POWER-UP ClinicalTrials.gov number, NCT00826774.).
authors.affiliation: Department of Psychiatry, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA. wadden@mail.med.upenn.edu
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Wadden
authors.forename: Sheri
authors.initials: S
authors.lastname: Volger
authors.forename: David B
authors.initials: DB
authors.lastname: Sarwer
authors.forename: Marion L
authors.initials: ML
authors.lastname: Vetter
authors.forename: Adam G
authors.initials: AG
authors.lastname: Tsai
authors.forename: Robert I
authors.initials: RI
authors.lastname: Berkowitz
authors.forename: Shiriki
authors.initials: S
authors.lastname: Kumanyika
authors.forename: Kathryn H
authors.initials: KH
authors.lastname: Schmitz
authors.forename: Lisa K
authors.initials: LK
authors.lastname: Diewald
authors.forename: Ronald
authors.initials: R
authors.lastname: Barg
authors.forename: Jesse
authors.initials: J
authors.lastname: Chittams
authors.forename: Reneé H
authors.initials: RH
authors.lastname: Moore
mesh_terms: D000328:Adult; D001521:Behavior Therapy; D002318:Cardiovascular Diseases; D003376:Counseling; D004038:Diet, Reducing; D015444:Exercise; D005260:Female; D006801:Humans; D057194:Intention to Treat Analysis; D008019:Life Style; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000503:physiopathology / Q000628:therapy*; D011320:Primary Health Care; D012307:Risk Factors; D040242:Risk Reduction Behavior; D015431:Weight Loss
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