Table 2 Characteristics of the included systematic review (n = 17)

Review intervention type

 Broad scope (any intervention type)

9

53

 Technological interventions

6

35

 Group reminiscence therapy

1

6

 Physical activity

1

6

Review focus

 Social isolation and loneliness

8

47

 Loneliness

5

29

 Social isolation

4

24

Review population characteristics

 Older adults not necessarily lonely and/or socially isolated

15

88

 Focused on lonely and/or socially isolated older adults

2

12

Publication year

 2019–2021

6

35

 2015–2018

9

53

 2011–2014

2

12