Table 1.

Definition of Proctor’s implementation outcomes³⁵

Implementation outcome	Analysis level	Definition used in this review; other synonyms
Acceptability	Individual provider or individual consumer	Satisfaction with various aspects of PrEP delivery to AGYW; content, complexity, delivery, credibility and comfort
Adoption	Individual provider or organisation	Initiation of PrEP by AGYW; utilisation, uptake, intention to try, implementation
Appropriateness	Individual provider or individual consumer or organisation	Perceived fit of PrEP delivery; relevance, compatibility, suitability, usefulness, practicability
Feasibility	Individual provider or organisation	Actual fit of PrEP delivery; utility, suitability for everday use; practicability
Fidelity	Individual provider	Quality of programme delivery; delivered as intended, adherence, integrity
Implementation cost	Provider or providing institution	Cost of implementing PrEP delivery; marginal cost, cost-effectiveness, cost–benefit
Penetration	Organisation or setting	Level of institutionalisation of PrEP; spread
Sustainability	Individual consumer or administrators or orgnanisaiton	Continuation of PrEP by AGYW; maintenance, sustained use, durability, incorporation, integration, institutionalisation, routinisation

AGYW, adolescent girls and young women; PrEP, pre-exposure prophylaxis.