Mei-Wei Chang1, Alai Tan2, Jiying Ling3, Duane T Wegener4, Lorraine B Robbins5. 1. The Ohio State University College of Nursing, 1585 Neil Avenue, Columbus, OH, 43210, USA. Electronic address: chang.1572@osu.edu. 2. The Ohio State University College of Nursing, 1585 Neil Avenue, Columbus, OH, 43210, USA. 3. Michigan State University College of Nursing, 1355 Bogue St, East Lansing, MI, 48824, USA. Electronic address: lingjiyi@msu.edu. 4. The Ohio State University Department of Psychology, 1835 Neil Avenue, Columbus, OH, 43210, USA. Electronic address: wegener.1@osu.edu. 5. Michigan State University College of Nursing, 1355 Bogue St, East Lansing, MI, 48824, USA. Electronic address: robbin76@msu.edu.
Abstract
PURPOSE: We investigated whether autonomous motivation and self-efficacy might mediate the association between a lifestyle behavior intervention and dietary fat intake in low-income overweight or obese women with young children. METHODS: Participants were randomized to an intervention or comparison group. Intervention participants received a 16-week intervention aimed to prevent weight gain through promotion of stress management, healthy eating and physical activity. During the intervention phase, participants viewed a designated video lesson at home and dialed in a peer support group teleconference every week (weeks 1-4) then every other week (weeks 5-16). Potential mediation effects were analyzed using sequential mixed-effects linear models and path analysis. RESULTS: The intervention led to increased autonomous motivation (β = 0.34, standard error [SE] = 0.15, P = 0.005), which subsequently increased self-efficacy (β = 0.18, SE = 0.35, P < 0.001), and higher levels of self-efficacy were associated with decreased dietary fat intake (β = -0.22, SE = 0.28, P < 0.001). In other words, autonomous motivation and self-efficacy mediated the association between the lifestyle behavior intervention and dietary fat intake. CONCLUSION: To decrease dietary fat intake for low-income overweight or obese women with young children, strategies, such as those promoting peer encouragement, may be warranted in interventions to enhance autonomous motivation and/or practical skills for increasing self-efficacy.
RCT Entities:
PURPOSE: We investigated whether autonomous motivation and self-efficacy might mediate the association between a lifestyle behavior intervention and dietary fat intake in low-income overweight or obesewomen with young children. METHODS:Participants were randomized to an intervention or comparison group. Intervention participants received a 16-week intervention aimed to prevent weight gain through promotion of stress management, healthy eating and physical activity. During the intervention phase, participants viewed a designated video lesson at home and dialed in a peer support group teleconference every week (weeks 1-4) then every other week (weeks 5-16). Potential mediation effects were analyzed using sequential mixed-effects linear models and path analysis. RESULTS: The intervention led to increased autonomous motivation (β = 0.34, standard error [SE] = 0.15, P = 0.005), which subsequently increased self-efficacy (β = 0.18, SE = 0.35, P < 0.001), and higher levels of self-efficacy were associated with decreased dietary fat intake (β = -0.22, SE = 0.28, P < 0.001). In other words, autonomous motivation and self-efficacy mediated the association between the lifestyle behavior intervention and dietary fat intake. CONCLUSION: To decrease dietary fat intake for low-income overweight or obesewomen with young children, strategies, such as those promoting peer encouragement, may be warranted in interventions to enhance autonomous motivation and/or practical skills for increasing self-efficacy.
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