Table 1.

Tele-STELLA Intervention Characteristics (Gaugler et al., 2020)

Dimension	Definition	Options
Mode	Contact method between Care Partner (CP) and Guide	• Secure videoconferencing with CP to deliver intervention • Telephone: Contact CPs, use for intervention if unable to connect via videoconferencing • Email: Delivery of surveys, study information, retention letters and general communication with CPs • Texting: Communication with CPs, Guides, other team members
Delivery Materials	Materials used in delivery of Tele-STELLA	• Tele-STELLA Handbook for CPs • Guide Manual for interventionist
Fidelity Assessment Materials	Used by investigator to assess Guide fidelity to intervention	• Content Adherence Checklist
Location	Where participants are recruited and where Tele-STELLA is delivered	• CPs recruited and pre-screened from three ADRC’s located in Oregon, Georgia and Kentucky • Full screen, consent, and implementation at OADRC • CPs from the three ADRCs access Tele-STELLA on a computer in their own homes
Schedule	Duration and intensity of Tele-STELLA	Nova Component	• Four weekly one-to-one sessions (one Guide to one CP). Sessions to last up to 1 hour • Four one-to-several sessions (one Guide to up to four CPs). Sessions last up to 1 hour
		• The Constellation • Component	• A repeat of the same curriculum, in large group sessions, similar to the ECHO model
Scripting	Degree of scripted material for Guide	• Screening interview scripted • Intervention informed by weekly topics and goals. Key points highlighted, but not scripted • Expectation that Guides will assist CPs in addressing at least 2 behavioral symptoms • Guides encouraged to tailor intervention to CP needs
Sensitivity to CP characteristics	Degree that Tele-STELLA is personalized to CP’s background, culture and experience	• Highly personalized to CP within the intervention framework • CP identifies target behavioral symptoms (both CP’s and Care Recipient’s) • Guide assists CP in identifying strategies to address symptoms
Interventionist characteristics	Qualifications and training; concordance with CP characteristics	• Guides: Nurse professionals • Experience working with families • Trained in STELLA intervention • Undergo ongoing fidelity assessments • Completion of unconscious bias training • Competent in videoconferencing • Sensitivity to cultural values of participants • Attend weekly meetings with team
Adaptability	Extent to which STELLA can be modified (what and when)	• Mode of delivery: Study technicians set up and test internet connection at study start. If internet fails, CPs can use phone • Duration of sessions: Up to 60 minutes • Location: CP can be at any private location • Content: Personalize to CP • Group size:  - Nova: One-Guide-to-several CPs: Can be as few as 2 CPs or as many as 5  - Constellation: One to three Guides depending on Constellation Group size.  - Constellation can have as many as 20 Care Partners • Guide: Guides may change over intervention. CPs will be advised of this
Treatment Delivery	Documentation of Guide adherence to treatment plan	• Number and duration of sessions • Content covered • Guides use Tracking Logs to note implementation of intervention components and CP attendance
Treatment Receipt	Degree that CPs implemented ABC plan	• Guide verifies CP ABC plan • CP reports use of ABC plan during sessions • Fidelity assessments of video recordings indicate CP receipt of information
Treatment Enactment	Degree that ABC plan is applied in real-world setting	• Guide appraisal of knowledge and use of CP’s ABC plan • Surveys indicate CPs contact each other • Fidelity assessments of video recordings indicate CP receipt of information
Treatment content strategies	Strategies aimed at improving outcomes	• Information on skills and support provided via instruction and Tele-STELLA Handbook • Facilitation of development of ABC plan • Facilitation of communication and support between CPs
Mechanisms of Action-Objective	Objective assessment of processes that affect desired treatment outcomes	• Surveys delivered to CPs via email prior to and after the intervention and weekly sessions • CPs complete surveys in privacy   -Behavioral symptoms frequency   -CP reactivity to BPSD   -Depression   -Quality of Life   -Grief   -Use of psychoactive medications   -Out-of-pocket Costs