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Table 1 Definition of the process evaluation outcome measures [24-26, 31]

From: Process evaluation of the Walk Well study: a cluster-randomised controlled trial of a community based walking programme for adults with intellectual disabilities

Context How external factors influence the delivery and functioning of an intervention.
Recruitment and retention The factors associated with uptake and ongoing engagement with the intervention.
Reach The extent to which the target audience comes into contact with the intervention.
Implementation The structures, resources and processes through which delivery is achieved, and the quantity and quality of what is delivered.
Fidelity The extent to which the intervention is delivered as conceived.