. Author manuscript; available in PMC: 2019 Jul 29.

Published in final edited form as: J Biomed Inform. 2019 Apr 23;94:103187. doi: 10.1016/j.jbi.2019.103187

Table 6.

Key Constructs and Definitions Relating to Engagement of Digital Interventions

Construct	Definition	Source
Engagement (experience)	Users’ experience of the program, including the support from coaches	[12,51]
Engagement (usage)	Factors relating participants’ efforts to complete elements of the intervention as prescribed	[52,53]
Environment	External factors affecting engagement	[1]
Improvement	Symptom improvement	[13]
Mechanisms	Intervention mechanisms, content and skills	[13]
Usability	Usability perceptions	[1]