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Community intervention trials: reflections on the Stanford Five-City Project Experience
S P Fortmann1, J A Flora, M A Winkleby
1Center for Research in Disease Prevention, Stanford University School of Medicine, Palo Alto, CA 94304-1825, USA.
American Journal of Epidemiology
|September 15, 1995
Summary
Community health promotion studies show promise for cardiovascular disease prevention. However, challenges in study design limit definitive conclusions on overall effectiveness, highlighting the need for new research directions.
Area of Science:
- Public Health
- Health Promotion
- Cardiovascular Disease Prevention
Background:
- Community intervention studies aim to reduce cardiovascular disease (CVD) risk.
- The community approach addresses population-wide risk factors and health behaviors efficiently.
- Previous trials faced validity threats due to limited study units (e.g., cities).
Purpose of the Study:
- To reflect on lessons learned from the Stanford Five-City Project (began 1978).
- To evaluate the advantages and limitations of community-based health interventions.
- To identify future research needs in population-level health change.
Main Methods:
- Analysis of the Stanford Five-City Project, a community intervention study.
- Evaluation of intervention components for generalizability, diffusion, and efficiency.
- Assessment of design limitations, including control site changes.
Main Results:
- Intervention components showed individual effectiveness and mass media reached populations.
- Community interventions offered generalizability and efficient population reach.
- Unexpected favorable changes in control sites complicated definitive outcome assessment.
Conclusions:
- Communitywide health promotion is generally effective for CVD risk reduction.
- Study design limitations, particularly in control groups, hinder definitive conclusions.
- Future research should explore determinants of population change and enhance policy/environmental interventions.