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Changes in self-efficacy and dietary adherence: The impact on weight loss in the PREFER study

Warziski, MT and Sereika, SM and Styn, MA and Music, E and Burke, LE (2008) Changes in self-efficacy and dietary adherence: The impact on weight loss in the PREFER study. Journal of Behavioral Medicine, 31 (1). 81 - 92. ISSN 0160-7715

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Findings from studies examining self-efficacy and its relationship to weight loss have been inconsistent. We examined self-efficacy specific to changing eating behaviors in the PREFER trial, an 18-month behavioral weight-loss study, to determine if self-efficacy and dietary adherence were associated with weight change, and what impact self-efficacy had on weight change after controlling for adherence. Measurements included the weight efficacy lifestyle (WEL) questionnaire, body weight, self-reported fat gram intake, kilocalorie intake, and adherence to kilocalorie and fat gram goals at baseline, 6, 12, and 18 months. The sample (N = 170) was 88.2% female and 70.0% Caucasian; the mean age was 44.1 years (SD = 8.8). Mean weight loss at 18 months was 4.64% (SD = 6.24) of baseline body weight and the mean increase in self-efficacy was 11.70% (SD = 38.61). Self-efficacy improved significantly over time (p = 0.04) and was associated with weight loss (p = 0.02). Adherence to the fat gram goal was associated with weight loss (p = 0.0003), and self-efficacy remained associated with weight loss after controlling for fat gram adherence (p = 0.0001). Consistent with self-efficacy theory, improvement in self-efficacy over time supported greater weight loss. Adherence to the fat gram goal also influenced weight loss. © 2007 Springer Science+Business Media, LLC.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Warziski, MT
Sereika, SMssereika@pitt.eduSSEREIKA
Styn, MA
Music, E
Burke, LElbu100@pitt.eduLBU1000000-0003-2434-9867
Date: 1 February 2008
Date Type: Publication
Journal or Publication Title: Journal of Behavioral Medicine
Volume: 31
Number: 1
Page Range: 81 - 92
DOI or Unique Handle: 10.1007/s10865-007-9135-2
Schools and Programs: School of Nursing > Nursing
Refereed: Yes
ISSN: 0160-7715
MeSH Headings: Adolescent; Adult; Body Weight; Cognitive Therapy; Diet, Fat-Restricted; Diet, Reducing; Diet, Vegetarian; Dietary Fats--administration & dosage; Energy Intake; Feeding Behavior; Female; Food Habits--psychology; Humans; Male; Middle Aged; Questionnaires; Self Efficacy; Weight Loss; Young Adult
PubMed ID: 17963038
Date Deposited: 24 Sep 2012 19:50
Last Modified: 26 Jan 2022 12:55


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