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Models of Health Promotion and Illness Prevention II01:18

Models of Health Promotion and Illness Prevention II

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Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
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Published on: March 7, 2019

Economic analysis of physical activity interventions.

Shinyi Wu1, Deborah Cohen, Yuyan Shi

  • 1RAND Corporation, Santa Monica, CA, USA.

American Journal of Preventive Medicine
|January 18, 2011
PubMed
Summary

Physical activity interventions vary in cost-effectiveness. Point-of-decision prompts are cheapest but least effective, while behavior change programs are costlier but yield greater physical activity benefits.

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Area of Science:

  • Public Health
  • Exercise Science
  • Health Economics

Background:

  • Numerous physical activity interventions exist, but their effectiveness and cost have not been systematically ranked.
  • Understanding the cost-effectiveness of different strategies is crucial for public health resource allocation.

Purpose of the Study:

  • To systematically review physical activity interventions and calculate their cost-effectiveness ratios.
  • To compare the cost-effectiveness and effect sizes of various physical activity promotion strategies.

Main Methods:

  • Conducted a systematic literature review of 5579 articles to identify 91 effective physical activity interventions.
  • Calculated cost-effectiveness ratios as cost per MET-hour gained per day per individual reached.
  • Compared intervention benefits to U.S. guideline-recommended physical activity levels.

Main Results:

  • Point-of-decision prompts were the most cost-effective ($0.07/MET-hour/day/person) but had minimal impact (0.2% of recommended activity).
  • School-based interventions for youth were cost-effective ($0.42/MET-hour/day/person), providing 16% of recommended activity.
  • Individually adapted behavior change and social support programs were least cost-effective ($0.84-$1.16/MET-hour/day/person) but had the largest effect sizes (35%-43%).

Conclusions:

  • Intervention choice should balance cost-effectiveness, effect size, and study quality.
  • No single intervention type is optimal; selection depends on specific goals and resources.