Objective
To examine the extent to which participants in a combined physical activity (PA) and dietary intervention achieved changes in multiple health behaviors.
Design
Group randomized trial; includes participants assigned to the intervention group only.
Setting
36 churches in South Carolina.
Participants
360 African American church members.
Intervention
15-month PA and dietary intervention, guided by the structural ecological model, targeting environmental (i.e. social, cultural, physical) and organizational (i.e. policies, practices) changes within the church.
Main Outcome Measures
Self-reported PA, fruit and vegetable consumption, fat-, and fiber-related behaviors.
Analysis
Change in each behavior was defined as unadjusted pretest-posttest improvement ≥0.20 of the baseline standard deviation. The total number and each combination of behaviors changed were calculated.
Results
19.2% changed no health behaviors as defined above, 31.4% changed one health behavior, 30.8% changed two health behaviors, 13.3% changed three health behaviors, and 5.3% changed all four of the targeted health behaviors. Combinations of multiple behavior change included PA and dietary behaviors, suggesting both behaviors can be changed simultaneously.
Conclusions and Implications
Nearly half of participants changed at least two health behaviors. Faith-based interventions targeting environmental and organizational change can successfully change multiple behaviors, potentially leading to greater improvements in public health.