Table 9 The RE-AIM dimensions: definitions and levels of measurement

Reach

The absolute number, proportion, and representativeness of individuals who are willing to participate in a given initiative

Individual

Effectiveness

The impact of an intervention on important outcomes, including potential negative effects, quality of life, and economic outcomes

Individual

Adoption

The absolute number, proportion, and representativeness of settings and intervention agents (people who deliver the program) who are willing to initiate a program

Staff and Organizational

Implementation

The intervention agents’ fidelity to the various elements of an intervention’s protocol, including consistency of delivery as intended and the time and cost of the intervention

Staff and Organizational

Maintenance

The extent to which a program or policy becomes institutionalized or part of routine organizational practices and policies at the setting-level. At the individual level, maintenance is defined as the long-term effects of a program on outcomes 6 or more months after the most recent intervention contact

Individual and Organizational