title: Impact of intervention dose on cancer-related health behaviors among working-class, multiethnic, community health center patients.
abstract: OBJECTIVE
  To examine the relationship between intervention dose and health behavior change in Healthy Directions-Health Centers, an intervention designed to reduce cancer risk factors. DESIGN. Analysis of intervention condition participant data from a randomized controlled trial.
  
  
  METHODS
  Community health centers in Massachusetts.
  
  
  METHODS
  Patients residing in low-income, working-class, multiethnic neighborhoods.
  
  
  METHODS
  Components were clinician endorsement, in-person counseling session and four telephone counseling sessions with a trained health advisor, and social-contextual tailored materials.
  
  
  METHODS
  Intervention dose was number of six possible intervention components completed by each participant. Changes in fruit and vegetable consumption, red meat consumption, physical activity, and multivitamin intake between baseline (n=1088) and 8-month follow-up (n=967; 89% of baseline sample) were determined.
  
  
  METHODS
  Bivariate and multivariate associations between intervention dose and change in health behaviors were examined.
  
  
  RESULTS
  In multivariate analysis, the association between intervention dose and increase in multivitamin intake approached significance (p < .07). Seventy percent of participants completed all intervention activities. In bivariate analysis, completion of four telephone counseling calls was associated with decrease in red meat consumption (p < .05).
  
  
  CONCLUSIONS
  These findings indicate that future studies should examine the number, content, and length of contacts needed for behavior change. The results also suggest that health centers are a channel for reaching diverse populations, as shown by the high level of intervention implementation.
authors: National Human Genome Research Institute, Social and Behavioral Research Branch, 2 Center Drive, MSC 0249, Building 2, Room 4E30, Bethesda, MD 20892, USA. kkaphing@mail.nih.gov
authors: Kimberly A
authors: KA
authors: Kaphingst
authors: Rebecca
authors: R
authors: Lobb
authors: Martha E
authors: ME
authors: Fay
authors: Mary K
authors: MK
authors: Hunt
authors: Elizabeth Gonzalez
authors: EG
authors: Suarez
authors: Robert H
authors: RH
authors: Fletcher
authors: Karen M
authors: KM
authors: Emmons
mesh_terms: D003153:Community Health Services / Q000458:organization & administration*; D003376:Counseling / Q000379:methods; D004032:Diet; D005006:Ethnicity; D005260:Female; D015438:Health Behavior; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D008297:Male; D009043:Motor Activity; D009369:Neoplasms / Q000517:prevention & control*; D011203:Poverty; D017064:Process Assessment, Health Care