- Title
- How effective are physical activity interventions when they are scaled-up: a systematic review
- Creator
- Lane, Cassandra; McCrabb, Sam; Nathan, Nicole; Naylor, Patti-Jean; Bauman, Adrian; Milat, Andrew; Lum, Melanie; Sutherland, Rachel; Byaruhanga, Judith; Wolfenden, Luke
- Relation
- The International Journal of Behavioral Nutrition and Physical Activity Vol. 18, Issue 1, no. 16
- Publisher Link
- http://dx.doi.org/10.1186/s12966-021-01080-4
- Publisher
- BioMed Central
- Resource Type
- journal article
- Date
- 2021
- Description
- Background: The ‘scale-up’ of effective physical activity interventions is required if they are to yield improvements in population health. The purpose of this study was to systematically review the effectiveness of community-based physical activity interventions that have been scaled-up. We also sought to explore differences in the effect size of these interventions compared with prior evaluations of their efficacy in more controlled contexts, and describe adaptations that were made to interventions as part of the scale-up process. Methods: We performed a search of empirical research using six electronic databases, hand searched reference lists and contacted field experts. An intervention was considered ‘scaled-up’ if it had been intentionally delivered on a larger scale (to a greater number of participants, new populations, and/or by means of different delivery systems) than a preceding randomised control trial (‘pre-scale’) in which a significant intervention effect (p < 0.05) was reported on any measure of physical activity. Effect size differences between pre-scale and scaled up interventions were quantified ([the effect size reported in the scaled-up study / the effect size reported in the pre-scale-up efficacy trial] × 100) to explore any scale-up ‘penalties’ in intervention effects. Results: We identified 10 eligible studies. Six scaled-up interventions appeared to achieve significant improvement on at least one measure of physical activity. Six studies included measures of physical activity that were common between pre-scale and scaled-up trials enabling the calculation of an effect size difference (and potential scale-up penalty). Differences in effect size ranged from 132 to 25% (median = 58.8%), suggesting that most scaled-up interventions typically achieve less than 60% of their pre-scale effect size. A variety of adaptations were made for scale-up – the most common being mode of delivery.
- Subject
- physical activity; scale-up; scale-up penalty; adaptations
- Identifier
- http://hdl.handle.net/1959.13/1474622
- Identifier
- uon:49323
- Identifier
- ISSN:1479-5868
- Language
- eng
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