Table 1

RE-AIM dimensions, definitions and assessment levels for evaluation of the ABCD pilot interventions

Dimension	Definition	Level of assessment
Reach	The ability to identify targeted population(s) at an organisational level and the absolute number, proportion and representativeness of individuals who are willing to participate in an intervention	Individual and organisational
Effectiveness	The impact of an intervention on important outcomes, including potential negative effects and quality of life	Individual
Adoption	The absolute number, proportion, and representativeness of settings and intervention agents (ie, people who deliver the programme) who are willing to initiate an intervention	Organisational
Implementation	At the individual level, implementation refers to clients’ use of the intervention strategies. At the setting level, implementation refers to 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	Individual and organisational
Maintenance	At the individual level, maintenance has been defined as the long-term effects of a programme on outcomes six or more months after the most recent intervention contact. At the setting level, maintenance refers to the extent to which a programme or policy becomes institutionalised or part of the routine organisational practices and policies	Individual and organisational