title: The influence of health behavior clusters on dietary change.
abstract: BACKGROUND
  The goal of this study was to identify cancer preventive health behavior clusters and to determine if clusters responded differently to a year-long intervention to increase fruit and vegetable consumption.
  
  
  METHODS
  The North Carolina Strategies for Improving Diet, Exercise, and Screening (NC STRIDES) is a health communications intervention (n = 595) among colorectal cancer survivors and a comparison population. Cluster analysis was used to identify nonoverlapping groups based on fruit and vegetable intake (servings/day), physical activity (minutes/day), multivitamin use (yes/no), and body mass index (kg/m2). Logistic regression was performed to assess positive change in fruit and vegetable servings, using the healthiest cluster as the reference group.
  
  
  RESULTS
  Five clusters were formed; they differed significantly by health behaviors and demographics. Clusters 1 and 2 (those following the "Healthy Choices" and "Eating Well" patterns) were eating more than 5 A Day before the intervention (8.6 and 6.9 servings/day), and did not show any increase. Cluster 3 ("Physically Active") reported an increase of 1.3 servings/day to reach 5.4 servings/day, and Clusters 4 and 5 ("Average Americans" and "Most Challenged") improved one serving/day for final intakes of 5.2 and 5.0 servings/day.
  
  
  CONCLUSIONS
  These findings illustrate some differences in magnitude of response to a fruit and vegetable intervention based on health behavior profiles. Creating clusters or other categories from baseline health behaviors may help to further improve targeting and/or tailoring in health promotion interventions.
authors.affiliation: Division of Cancer Prevention, National Cancer Institute, Bethesda, MD 20892-7344, USA. reedyj@mail.nih.gov
authors.forename: Jill
authors.initials: J
authors.lastname: Reedy
authors.forename: Pamela S
authors.initials: PS
authors.lastname: Haines
authors.forename: Marci Kramish
authors.initials: MK
authors.lastname: Campbell
mesh_terms: D000368:Aged; D016022:Case-Control Studies; D016000:Cluster Analysis; D015179:Colorectal Neoplasms / Q000175:diagnosis / Q000401:mortality / Q000628:therapy*; D004032:Diet; D019587:Dietary Supplements; D015444:Exercise / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D015438:Health Behavior; D006801:Humans; D008019:Life Style; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D009657:North Carolina; D010353:Patient Education as Topic / Q000379:methods*; D011788:Quality of Life; D012016:Reference Values; D018570:Risk Assessment; D017741:Survivors; D014815:Vitamins / Q000627:therapeutic use
chemical_list: D014815:Vitamins