Direct and mediated effects of two theoretically based interventions to increase consumption of fruits and vegetables in the Healthy Body Healthy Spirit trial
| Autor: | Amy L. Yaroch, Amiram D. Vinokur, Geoffrey C. Williams, Abdul R. Shaikh, Ken Resnicow |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Male Georgia Health Behavior Motivational interviewing Psychological intervention Structural equation modeling Social support Arts and Humanities (miscellaneous) Vegetables Humans African american Motivation Public Health Environmental and Occupational Health Social Support Middle Aged Moderation Self Efficacy Diet Black or African American Fruits and vegetables Fruit Female Psychology Social psychology Demography |
| Zdroj: | Health educationbehavior : the official publication of the Society for Public Health Education. 38(5) |
| ISSN: | 1552-6127 |
| Popis: | This study tested the effects of two theory-based interventions to increase fruit and vegetable intake. Hypothesized intervention mediators included self-efficacy (SE), social support (SS), autonomous motivation (AM), and controlled motivation (CM). At baseline, 1,021 African American adults were recruited from 16 churches randomized to one comparison and two intervention groups: Group 1 (standard educational materials), Group 2 (culturally targeted materials), and Group 3 (culturally targeted materials and telephone-based motivational interviewing). A well-fitted model based on structural equation modeling—χ2( df = 541, N = 353, 325) = 864.28, p < .001, normed fit index = .96, nonnormed fit index = .98, comparative fit index = .98, root mean square error of approximation = .042—demonstrated that AM was both a significant mediator and moderator. In the subgroup with low baseline AM, AM mediated 17% of the effect of the Group 3 intervention on fruit and vegetable intake. Conversely, SS, SE, and CM were not significant mediators. Implications related to theory and intervention development are discussed. |
| Databáze: | OpenAIRE |
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