Evaluating the implementation and effectiveness of the switch–ms: An ecological, multi-component adolescent obesity prevention intervention

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Abstract

Background: The purpose of this study was to evaluate the implementation and effectiveness of an ecological, multi-component adolescent obesity prevention intervention called School Wellness Integration Targeting Child Health–Middle School (SWITCH–MS). Methods: Following the effectiveness-implementation hybrid type 3 quasi-experimental design, seven middle schools (377 students) in Iowa, United States, were stratified into “experienced” (n = 3; 110 students) or “inexperienced” (n = 4; 267 students) groups to receive the 12-week SWITCH–MS intervention. To evaluate implementation, school informants (n = 10) responded to a survey and students completed behavioral tracking in the classroom on a website. For effectiveness evaluation, students in 6th, 7th, and 8th grades completed a validated questionnaire before and after intervention, to measure behaviors of physical activity (PA; “Do”), screen-based activity (“View”), and fruits and vegetable consumption (“Chew”). Results: The two groups of schools showed similar levels of implementation for best practices, awareness, and engagement. Behavioral tracking rate favored the experienced schools early on (47.5% vs. 11.7%), but differences leveled off in weeks 3–12 (sustained at 30.1–44.3%). Linear mixed models demonstrated significant time effects for “Do” (at school and out of school; p <0.01) and “View” behaviors (p = 0.02), after controlling for student-and schoollevel covariates. Conclusions: This study demonstrates that prior experience with SWITCH–MS may not be a prominent factor for implementation and effectiveness, although greater experience is associated with favorable behavioral tracking when the intervention is first launched.

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Chen, S., Rosenkranz, R. R., McLoughlin, G. M., Vazou, S., Lanningham-Foster, L., Gentile, D. A., & Dzewaltowski, D. A. (2020). Evaluating the implementation and effectiveness of the switch–ms: An ecological, multi-component adolescent obesity prevention intervention. International Journal of Environmental Research and Public Health, 17(15), 1–12. https://doi.org/10.3390/ijerph17155401

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