title: A Mixed-Methods Evaluation of the Choose Less, Weigh Less Portion Size Health Marketing Campaign in Los Angeles County.
abstract: OBJECTIVE
  To assess the impact of the Choose Less, Weigh Less portion size health marketing campaign.
  
  
  METHODS
  A mixed-methods, cross-sectional evaluation.
  
  
  METHODS
  A quantitative Internet panel survey was administered through an online sampling vendor and qualitative interviews were conducted by street intercept.
  
  
  METHODS
  The panel survey included 796 participants, weighted to represent Los Angeles County. Street intercept interviews were conducted with 50 other participants.
  
  
  METHODS
  The Choose Less, Weigh Less campaign included print media on transit shelters, bus and rail cars, and billboards; radio and online advertising; and Web site content and social media outreach.
  
  
  METHODS
  The panel survey measured self-reported campaign exposure and outcomes, including knowledge of recommended daily calorie limits, attitudes toward portion sizes, and intent to reduce calories and portion size. Intercept interviews assessed campaign appeal, clarity, and utility.
  
  
  METHODS
  Weighted survey data were analyzed using logistic regression to assess the association between campaign exposure and outcomes. Interview data were analyzed for themes.
  
  
  RESULTS
  The campaign reached 19.7% of the Los Angeles County population. Significant differences were seen for 2 of the 10 outcomes assessed. Participants who saw the campaign were more likely than those who did not to report fast-food portion sizes as being too large (adjusted odds ratio [Adj. OR]: 1.89; 95% confidence interval [CI]: 1.16, 3.07) and intention to choose a smaller portion (Adj. OR: 1.99; 95% CI: 1.20, 3.31). Qualitative data revealed three themes about appeal, clarity, and utility.
  
  
  CONCLUSIONS
  Health marketing efforts targeting portion size can have relatively broad reach and limited but positive impacts on consumer attitudes and intent to select smaller portions.
authors: Lauren N. Gase, MPH; Noel C. Barragan, MPH; Brenda Robles, MPH; Michael Leighs, MPP; and Tony Kuo, MD, MSHS, are with the Division of Chronic Disease and Injury Prevention, Los Angeles County Department of Public Health, Los Angeles, California. Tony Kuo, MD, MSHS, is with the Department of Family Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California.
authors: Lauren N
authors: LN
authors: Gase
authors: Lauren N. Gase, MPH; Noel C. Barragan, MPH; Brenda Robles, MPH; Michael Leighs, MPP; and Tony Kuo, MD, MSHS, are with the Division of Chronic Disease and Injury Prevention, Los Angeles County Department of Public Health, Los Angeles, California. Tony Kuo, MD, MSHS, is with the Department of Family Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California.
authors: Noel C
authors: NC
authors: Barragan
authors: Lauren N. Gase, MPH; Noel C. Barragan, MPH; Brenda Robles, MPH; Michael Leighs, MPP; and Tony Kuo, MD, MSHS, are with the Division of Chronic Disease and Injury Prevention, Los Angeles County Department of Public Health, Los Angeles, California. Tony Kuo, MD, MSHS, is with the Department of Family Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California.
authors: Brenda
authors: B
authors: Robles
authors: Lauren N. Gase, MPH; Noel C. Barragan, MPH; Brenda Robles, MPH; Michael Leighs, MPP; and Tony Kuo, MD, MSHS, are with the Division of Chronic Disease and Injury Prevention, Los Angeles County Department of Public Health, Los Angeles, California. Tony Kuo, MD, MSHS, is with the Department of Family Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California.
authors: Michael
authors: M
authors: Leighs
authors: Lauren N. Gase, MPH; Noel C. Barragan, MPH; Brenda Robles, MPH; Michael Leighs, MPP; and Tony Kuo, MD, MSHS, are with the Division of Chronic Disease and Injury Prevention, Los Angeles County Department of Public Health, Los Angeles, California. Tony Kuo, MD, MSHS, is with the Department of Family Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California.
authors: Tony
authors: T
authors: Kuo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D004038:Diet, Reducing; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006293:Health Promotion; D006801:Humans; D007407:Interviews as Topic; D015141:Los Angeles; D008297:Male; D008875:Middle Aged; D036301:Qualitative Research; D040241:Social Marketing; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: Health focus: weight control; Manuscript format: research; Obesity, Nutrition; Outcome measure: cognitive; Portion Size; Prevention Research; Research purpose: program evaluation; Setting: community; Social Marketing; Strategy: education; Study design: nonexperimental, qualitative; Target population age: adults; Target population circumstances: low education, low income, urban population, racial/ethnic minorities