4. Length, duration, and delivery mode of the interventions .

Study	Intervention duration	Total number of sessions	Session frequency	Session duration	Total direct intervention	Session format	Intervention settings
Amieva 2016*	3 months therapy and 21 months maintenance	Therapy sessions: 14 Maintenance sessions: 16	Therapy sessions: weekly in the first 3 months Maintenance sessions: 6‐weekly over 21 months	90 minutes	Therapy sessions: 21 hours Maintenance sessions: 24 hours**	Individual	Not specified
Clare 2010	8 weeks	8	Weekly	60 minutes	8 hours	Individual	Home
Clare 2019	3 months therapy and 6 months maintenance	Therapy sessions: 10 Maintenance sessions: 4	Therapy sessions: weekly in the first 3 months Maintenance sessions: 6‐weekly over 6 months	60 minutes	Therapy sessions: 10 hours Maintenance sessions: 4 hours	Individual	Home
Clarkson 2022	4 weeks	4 (2 optional)	4 weekly sessions, 1st and 4th in person and 2nd and 3rd optional telephone follow‐ups	Protocol stipulated up to 6 hours of contact overall; a nested sub‐study reported an average of 3 hours	2 to 4 hours (most participants opted for 4 hours)	Individual	Home/telephone
Hindle 2018	8 weeks	8	Weekly	60 minutes	8 hours	Individual	Home
Thivierge 2014	4 weeks	8	Twice a week	45 to 60 minutes	8 hours	Individual	Home

*Care partners received telephone contact of frequency matching the CR sessions.

**Number of hours calculated based on authors’ description.