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- Title
Moderators of Theory-Based Interventions to Promote Physical Activity in 77 Randomized Controlled Trials.
- Authors
Bernard, Paquito; Carayol, Marion; Gourlan, Mathieu; Boiché, Julie; Romain, Ahmed Jérôme; Bortolon, Catherine; Lareyre, Olivier; Ninot, Gregory
- Abstract
A meta-analysis of randomized controlled trials (RCTs) has recently showed that theory-based interventions designed to promote physical activity (PA) significantly increased PA behavior. The objective of the present study was to investigate the moderators of the efficacy of these theory-based interventions. Seventy-seven RCTs evaluating theory-based interventions were systematically identified. Sample, intervention, methodology, and theory implementation characteristics were extracted, coded by three duos of independent investigators, and tested as moderators of interventions effect in a multiple-metaregression model. Three moderators were negatively associated with the efficacy of theory-based interventions on PA behavior: intervention length (≥14 weeks; β = -.22, p = .004), number of experimental patients (β = -.10, p = .002), and global methodological quality score (β = -.08, p = .04). Our findings suggest that the efficacy of theory-based interventions to promote PA could be overestimated consequently due to methodological weaknesses of RCTs and that interventions shorter than 14 weeks could maximize the increase of PA behavior.
- Subjects
CONFIDENCE intervals; HEALTH promotion; PSYCHOLOGY information storage &; retrieval systems; MATHEMATICAL models; RESEARCH methodology; MEDLINE; REGRESSION analysis; RESEARCH funding; STATISTICS; STUDY skills; SYSTEMATIC reviews; THEORY; EFFECT sizes (Statistics); RANDOMIZED controlled trials; PHYSICAL activity; DATA analysis software; DESCRIPTIVE statistics
- Publication
Health Education & Behavior, 2017, Vol 44, Issue 2, p227
- ISSN
1090-1981
- Publication type
Article
- DOI
10.1177/1090198116648667