Predictors of dietary change and maintenance in the Women's Health Initiative Dietary Modification Trial
Department of Medicine, Division of Preventive and Behavioral Medicine
Age Factors; Aged; Analysis of Variance; Cereals; Diet, Fat-Restricted; Dietary Fats; Educational Status; Energy Intake; Female; Fruit; Health Planning; Health Surveys; Humans; Longitudinal Studies; Middle Aged; Nutritional Sciences; Patient Compliance; Postmenopause; Vegetables; *Women's Health
Life Sciences | Medicine and Health Sciences | Women's Studies
OBJECTIVE: To identify predictors of dietary change to and maintenance of a low-fat eating pattern (or = 5 servings fruits/vegetables daily, and > or = 6 servings grains daily) among a cohort of postmenopausal women. Candidate predictors included intrapersonal, interpersonal, intervention program characteristics, and clinical center.
DESIGN: Longitudinal study within the Women's Health Initiative Dietary Modification Trial. Dietary change was evaluated after 1 year of participation in the Women's Health Initiative Dietary Modification Trial, and dietary maintenance after 3 years.
SUBJECTS: Postmenopausal women aged 50 to 79 years at baseline who were randomized to the intervention arm of the Women's Health Initiative Dietary Modification Trial (n=19,541).
STATISTICAL ANALYSIS: Univariate and multivariate linear regression analysis was performed and associations evaluated between candidate predictors and each of the three dietary goals: percent energy from fat, fruit/vegetable servings, and grain servings.
RESULTS: Year 1 (change) predictors of percent energy from fat (PCONCLUSIONS: The strongest predictors of dietary change and maintenance were attending intervention sessions and self-monitoring dietary intake. Novel was the finding that optimism predicted dietary change.
DOI of Published Version
J Am Diet Assoc. 2007 Jul;107(7):1155-66. Link to article on publisher's site
Journal of the American Dietetic Association
Tinker, Lesley F.; Rosal, Milagros C.; Young, Anne F.; Perri, Michael G.; Patterson, Ruth E.; Van Horn, Linda; Assaf, Annlouise R.; Bowen, Deborah J.; Ockene, Judith K.; Hays, Jennifer; and Wu, Lieling, "Predictors of dietary change and maintenance in the Women's Health Initiative Dietary Modification Trial" (2007). Women’s Health Research Faculty Publications. 447.