Table 2.

Summary of interventions and data collection

Study	Intervention group	Length of intervention period	Ø Volunteer–patient contact time per month	Control group	Data collection
					Baseline	During intervention	Postintervention	Follow-up(3 months)
Psychosocial–coordinative support
White et al. 2012 [111]	M (P)	0.5–9 months	13–120 min	Care as usual	X	X	X
Philippi et al. 2015 [108, 109, 112, 130]	V (H)	3 months	1161 min	Care as usual	X		X	X
Physical–cognitive activation
Haider et al. 2017 [113–116, 127]	V (H)	3 months	516 min	Social support	X		X
Etkin et al. 2006 [117]	V (H)	4 months	Not reported	No control group	X		X
Stolee et al. 2012 [119]	V (H)	3 months	Not reported	No control group	X		X
Connelly 2008 [118]	V (H)	3 months	Not reported	No control group	X		X
Assistance with medication intake
Wang et al. 2013 [120]	V (H + P)	2 months	218 min	Care as usual	X		X
Sales 2013 [121]	M (P)	1 month	65 min	Care as usual	X		X

H volunteer–patient contact by home visits; M Multiprofessional intervention, volunteers and professionals have contact with patients; P volunteer–patient contact by phone calls; V Patient contact solely by volunteers, professionals in background