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Psychosocial mediators of physical activity and fruit and vegetable consumption in the Faith, Activity, and Nutrition programme.

Abstract：

OBJECTIVE:Performing and publishing mediator analyses, whether significant or null, provides insight into where research efforts should focus and will assist in developing effective and powerful behaviour change interventions. The present study examined whether self-efficacy, social support and church support mediated changes in leisure-time physical activity (PA) and fruit and vegetable (F&V) consumption in a faith-based intervention. DESIGN:A 15-month PA and F&V intervention, guided by the structural ecological model, targeted the social, cultural and policy influences within the church. Outcomes and mediators were measured at baseline and follow-up. Data were collected from 2007 to 2011. MacKinnon's product of coefficients tested for mediation. SETTING:Sixty-eight African Methodist Episcopal churches in South Carolina, USA. SUBJECTS:Five hundred and eighty-two (PA) and 588 (F&V) church members. RESULTS:Despite the significant increases in PA and F&V consumption, none of the hypothesized mediators were significant mediators of change in PA or F&V consumption. When examining each path of the mediation model, the intervention did not change any of the hypothesized mediators. However, changes in some mediators were associated with changes in outcomes. CONCLUSIONS:Although there was no significant mediation, the association between changes in mediators and changes in PA and/or F&V consumption suggest that these variables likely play some role in changing these behaviours. Future studies should consider mediation analyses a priori, putting careful thought into the types of measures used and the timing of those measures, while also being cognizant of participant and staff burden. Finding a balance will be fundamental in successfully understanding how interventions exert their effects.

journal_name

Public Health Nutr

journal_title

Public health nutrition

authors

Baruth M,Wilcox S

doi

10.1017/S1368980014002808

subject

Has Abstract

pub_date

2015-08-01 00:00:00

pages

2242-50

issue

eissn

1368-9800

issn

1475-2727

pii

S1368980014002808

journal_volume

pub_type

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Psychosocial mediators of physical activity and fruit and vegetable consumption in the Faith, Activity, and Nutrition programme.