Table 2.

Care network participant key assessment domains and measures.

Domain	Measure	Time point	Who
Demographics	Self-report itemsa,b ICsc: age, gender, education, relationship with persons with multimorbidity, employment status, primary occupation, hours and type of care, and self-rated health FCsd and HCPse: age, gender, duration of care provided to persons with multimorbidity, and type of care provided to persons with multimorbidity	T1 only	ICc, FCd, and HCPe
Technology use and proficiency	The Mobile Device Proficiency Questionnairea [27]b	T1 and T4	IC and FC
Usability	System Usability Scale [39]	T4 (with a subset only)	IC and FC
User burden (technology)	User Burden Scalea [40]b	T4 (with a subset only)	IC and FC
Self-efficacy	General Self-Efficacy Scalea [32]b	T1 and T4	IC and FC
Stress	Perceived Stress Scale [41]: 14-item scale of the degree to which situations in an individual’s life are appraised as stressful	T1 and T4	IC and FC
Caregiver stress or psychological impact of caregiving	Caregiver Self-Assessment Questionnaire [42]: 18-item scale to measure the psychological impact (including stress) of caregivers	T1 and T4	IC
Caregiver burden	Zarit Burden Interview [43]: 22-item scale to measure the level of burden experienced by caregivers of patients	T1 and T4	IC

^aMeasures included as part of a paper-based questionnaire sent to participants in advance of the relevant interview.

^bThese measures were included as part of a paper-based questionnaire sent to participants in advance of the relevant interview.

^cIC: informal carer.

^dFC: formal carer.

^eHCP: health care professional.