Table 1.

Definition of implementation outcomes [23].

Domain	Definition
Adoption	Uptake of the LHSa initiative by health care professionals and health services
Acceptability	Health care professionals’ satisfaction with various aspects of the LHS initiative (eg, content, complexity, comfort, delivery, and credibility)
Appropriateness	Fit, relevance, compatibility, suitability, usefulness, and practicability perceived by health care professionals and patients
Feasibility	The actual fit, utility, and practicability of the program within a health service setting and its subsystems, as reported by health care professionals and managers
Fidelity	The LHS initiative delivered, as intended; adherence by health care professionals; and quality of program delivery
Cost	Financial impact of LHS implementation to the health service or organization
Penetration	Spread or reach of the LHS initiative assessed at the organization or setting level
Sustainability	The extent to which the LHS program is maintained or institutionalized within a health service’s standard operations

^aLHS: learning health system.