Table 5 Clusters of keywords that co-occurred in Web of Science under the keyword search related to it with the number of occurrences (O) and total link strength (TLS)

Web of Science

Cluster 1

Cluster 2

Cluster 3

Cluster 4

Keyword

O

TLS

Keyword

O

TLS

Keyword

O

TLS

Keyword

O

TLS

 patterns

43

103

mobility

146

371

Health

41

128

elderly

55

199

 physical activity

35

145

migration

33

68

Risk

30

84

people

27

81

 behavior

32

70

residential mobility

32

66

Aging

20

74

dementia

18

46

 walking

32

137

age

28

76

Mortality

19

51

performance

17

39

 accessibility

30

83

home

22

51

Dynamics

17

19

gait

14

41

 built environment

28

125

distance

17

45

Disability

16

58

balance

13

44

 neighborhood

23

94

gender

16

45

Environment

16

53

falls

10

37

 determinants

21

68

care

13

39

human mobility

14

18

 transport

19

67

place

13

19

Disease

13

26

Scopus

Cluster 1

Cluster 2

Cluster 3

Cluster 4

Keyword

O

TLS

Keyword

O

TLS

Keyword

O

TLS

Keyword

O

TLS

 activities

26

201

mobility

66

260

population dynamics

41

165

age

13

108

 cognition

25

135

spatial analysis

33

156

Physiology

25

139

age factor

10

82

 walking

24

152

neighborhood

23

126

growth, development and aging

18

29

 mobility limitation

19

154

travel behavior

19

68

metabolism

16

38

 gait

18

115

urban area

15

81

spatiotemporal analysis

16

45

 walking difficulty

16

138

transportation

14

62

Migration

12

39

 psychology

13

111

residence characteristics

12

108

Genetics

10

22

 quality of life

12

79

socioeconomic factors

12

98

residential mobility

10

24

 walking speed

12

83

built environment

11

73

 disability

11

84

urban population

11

66