Table 1 Master search strategy

1

exp voluntary workers/

2

(volunteer* or (charity adj worker*) or (voluntary adj3 worker*) or (voluntary adj group*) or (unpaid adj worker*) or (self-help adj group*)).ti,ab.

3

socially-productive.ti,ab.

4

or/1-3

5

(volunteerism or volunteering).ti,ab.

6

(volunteer adj (work or program* or service*)).ti,ab.

7

((voluntary or charit* or unpaid) adj work).ti,ab.

8

(altruis* or activis*).ti,ab.

9

(self-help or (peer adj support)).ti,ab.

10

(intergenerational adj program*).ti,ab.

11

(community adj (involvement or work)).ti,ab.

12

(helping adj others).ti,ab.

13

(social adj productiv*).ti,ab.

14

(caring or caregiving).ti,ab.

15

(social adj capital).ti,ab.

16

(productiv* adj/2 activit*).ti,ab

17

((civic or community) adj engagement).ti,ab

18

or/5-17

19

(health adj (benefit* or impact* or improvement*)).ti,ab.

20

((impact* or benefit* or improve*) adj2 health).ti,ab.

21

(well-being or wellbeing).ti,ab.

22

“quality of life”.ti,ab.

23

(psychological adj (health or functioning or effect*)).ti,ab.

24

(happiness or satisfaction or rehabilitation or self-esteem or empowerment).ti,ab. (

25

“sense of community”.ti,ab.

26

(community adj connection*).ti,ab.

27

((positive or negative) adj impact*).ti,ab.

28

mortality.ti,ab.

29

or/19-28

30

4 and 18 and 29

31

(volunteering or volunteerism).ti

32

(voluntary adj work*).ti

33

30 or 31 or 32