Table 1.

Relevant CFIR domains, constructs, and themes

Domain	Domain Description	Constructs	Themes
Intervention Characteristics	Covers the key aspects of an intervention that influence the success of implementation	- Adaptability - Complexity - Costs - Design quality and packaging - Evidence strength and quality - Intervention source - Relative advantage - Trialability	Facilitator: - Lived experience of CHWs with justice involvement (complexity and relative advantage) - Lack of restrictions to enrollment and voluntary nature of services (design quality and packaging) Facilitator and Challenge: - CHW integration into CBOs and healthcare settings (complexity and adaptability) - Expansive scope of work for CHWs (complexity and relative advantage) - Integration of trauma-informed approach (design quality and packaging)
Inner Setting	Refers to the setting within which the intervention was implemented. In the case of NYC HJN this includes both DOHMH and the six partner sites where CHWs were embedded	- Structural characteristics - Networks and communications - Culture - Implementation climate - Readiness for implementation	Barrier: - Lack of a formal implementation protocol (access to knowledge and information) Facilitator and Challenge: - Values alignment and existing infrastructure (compatibility and culture, relative priority and available resources) - Leadership engagement (leadership engagement) - CHW training and support (learning climate and networks and communication) - Input, feedback and communication (networks and communication)
Outer Setting	Encompasses external influences on program implementation. In the case of NYC HJN, this was anything outside of DOHMH and the six partner sites	- Cosmopolitanism - External policies and incentives - Patient needs and resources - Peer pressure	Facilitator: - Prioritizing participant needs (patient needs and resources, cosmopolitanism, and external policies and incentives)