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J Nutr Educ Behav. 2013 Jul-Aug;45(4):314-21. doi: 10.1016/j.jneb.2012.12.004. Epub 2013 Feb 20.

Self-efficacy as a predictor of weight change and behavior change in the PREMIER trial.

Author information

1
Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL 35294, USA. bcwingo@uab.edu

Abstract

OBJECTIVES:

Determine whether self-efficacy independently predicted weight loss in a behavioral intervention and explore factors that influence the path between self-efficacy and weight change.

DESIGN:

Secondary analysis of the PREMIER trial, a randomized controlled trial testing effects of lifestyle interventions on blood pressure.

SETTING:

Four academic medical centers.

PARTICIPANTS:

PREMIER recruited adults (n = 810) with pre-hypertension/stage 1 hypertension, not currently receiving medication. This analysis excluded participants in the control arm, resulting in n = 537.

INTERVENTIONS:

Participants were randomly assigned to 1 of 3 groups: advice only, established lifestyle recommendations, or established lifestyle recommendations plus Dietary Approaches to Stop Hypertension dietary pattern.

MAIN OUTCOME MEASURES:

Self-efficacy (dietary self-efficacy [DSE], exercise self-efficacy [ESE]), dietary intake, fitness.

ANALYSIS:

Pearson correlations, 1-way analysis of variance, mediation analyses.

RESULTS:

Despite an overall decrease in DSE/ESE, change in DSE/ESE significantly predicted weight change at 6 (β = -.21, P < .01; β = -.19, P < .01, respectively) and 18 months (β = -.19, P < .01; β = -.35, P < .01). Change in percent calories from fat partially mediated the DSE/weight change relationship at 6 months. Change in fitness partially mediated the ESE/weight change relationship at 18 months.

CONCLUSIONS AND IMPLICATIONS:

Changes in DSE/ESE were not associated with behavior change as hypothesized. Additional research is needed to identify mediators between self-efficacy and adoption of behaviors that influence weight loss.

PMID:
23433966
PMCID:
PMC4114041
DOI:
10.1016/j.jneb.2012.12.004
[Indexed for MEDLINE]
Free PMC Article

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