Self-rated quality of life measures: Effect of change to a low-fat, high-fiber, fruit and vegetable enriched diet Academic Article uri icon


MeSH Major

  • Adenomatous Polyps
  • Diet
  • Diet, Fat-Restricted
  • Dietary Fiber
  • Feeding Behavior
  • Food, Fortified
  • Fruit
  • Intestinal Neoplasms
  • Quality of Life
  • Self-Assessment
  • Vegetables


  • The Polyp Prevention Trial (PPT) was a multicenter, randomized clinical trial to determine the effect of a low-fat (20% of energy from fat), high-fiber (18 g/1,000 kcal/day), high-fruit/vegetable (3.5 servings/1,000 kcal/day) eatingplan on the recurrence of large bowel adenomatous polyps. The PPT provided an opportunity to examine the impact of dietary changes on quality of life. At baseline and annuallyfor 4 years, participants in the Quality of Life Substudy of PPT completed a Quality of Life Factors (QF) Questionnaire, a modified Block-National Cancer Institute Food Frequency Questionnaire, and a Health and Lifestyle Questionnaire. The 51-item QF Questionnaire assessed changes in nine domains: taste, convenience, cost, self-care, social, health assessment, health belief health action, and life satisfaction. The analysis compared annual changes in domain scores for intervention (n = 194) and control (n = 200) participants. At Year 1, 363 (92%) completed a questionnaire, and 325 (82%) participants completed a Year 4 questionnaire. There were no statistically significant differences between treatment groups in the change from baseline to Year 1 for the convenience, cost, taste, health assessment, and life satisfaction domains. At Year 1, intervention participants rated the self-care (p < .001), health belief (p = .021), and health action (p < .001) domains significantly higher and the social domain significantly lower (p <.001) than control participants. These changes were consistent through Years 2, 3, and 4. This study


publication date

  • January 2001



  • Academic Article



  • eng

PubMed ID

  • 11495220

Additional Document Info

start page

  • 198

end page

  • 207


  • 23


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