Moving from efficacy to effectiveness trials in prevention research

Area of Science:

• Public Health
• Clinical Psychology
• Intervention Science

Background:

• Efficacy trials assess interventions in controlled settings, while effectiveness trials evaluate them in real-world conditions.
• There is a growing need for effectiveness trials to understand intervention impact with typical clients and providers.
• Preventive interventions present unique challenges during the transition from efficacy to effectiveness research.

Purpose of the Study:

• To discuss conceptual and methodological issues in transitioning preventive interventions from efficacy to effectiveness research.
• To highlight factors influencing program effectiveness and implementation strategies in practice settings.
• To provide examples from eating disorder prevention research demonstrating this progression.

Main Methods:

• Literature review and synthesis of conceptual and methodological issues.
• Case examples from two research groups focusing on eating disorder prevention.
• Discussion of critical areas including program design, participant selection, context, and sustainability.

Main Results:

• The transition requires addressing specific considerations not always present in treatment research.
• Factors such as provider characteristics, context, measurement, cost, and sustainability are crucial for effectiveness.
• Real-world application necessitates a shift in research design and focus.

Conclusions:

• Effectiveness trials are vital for understanding how preventive interventions perform in ecologically valid settings.
• Successful implementation hinges on addressing a broad range of practical and contextual factors.
• The progression from efficacy to effectiveness research is essential for maximizing public health impact.