Searches	Results	Type
1	Aged/	2832463
2	“Aged, 80 and over”/	819963
3	*Aging/	137261
4	*Geriatrics/	25515
5	((55 year? or 65 year? or 75 year?) adj2 (above or older or over or plus)).ti,ab,kw.	27254
6	(“55 and over” or “65 and over” or “75 and over”).ti,ab,kw.	3586
7	((aged or elderly or geriatric* or old or older or senior?) adj2 (adult? or citizen? or individual? or people or person?)).ti,ab,kw.	193136
8	1 or 2 or 3 or 4 or 5 or 6 or 7	3033016
9	* Community Health Workers /	3151
10	*Health Auxiliary/	0
11	Hospital Volunteers/	1295
12	*Mentors/	5337
13	*Mentor/	5337
14	PEER GROUP/	18404
15	Counseling/ or Peer Group/	51411
16	Peers/	0
17	exp Peer Group/	18670
18	VOLUNTEERS/	9083
19	“Voluntary Worker”.mp. or Volunteers/	9087
20	(lay worker? or voluntary worker? or volunteer* or peer* or (train* adj2 student?)).ti,ab,kw.	259231
21	9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20	309427
22	8 and 21	43546
23	limit 22 to humans	42659
24	HOSPITALIZATION/	95288
25	Accidental Falls/	21340
26	“Quality of Life”/	168131
27	Mental Health/	32075
28	Physical Health.mp. [mp=title, abstract, original title, name of substance word, subject heading word, floating sub-heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier, synonyms]	17414
29	“EQ5D”.mp.	456
30	Quality-Adjusted Life Years/ or Cost-Benefit Analysis/ or “Quality of Life”/	239968
31	23 and (24 or 25 or 26 or 27 or 28 or 29 or 30)	2412
32	limit 31 to (humans and randomized controlled trial)	565
33	limit 31 to (humans and systematic reviews)	152
34	Exercise/	94722
35	Physical activity.mp.	92922
36	23 and (24 or 25 or 26 or 27 or 28 or 29 or 30 or 34 or 35)	3779
37	limit 36 to (humans and randomized controlled trial)	879
38	limit 37 to (humans and systematic reviews)	18