Table 3.

Clusters of keywords that co-occurred in Web of Science under the keyword search related to it. Only the top 50 keywords out of a total of 3716 were considered

Cluster	Keywords
1	Patterns, physical-activity, behavior, walking, accessibility, built environment, neighborhood, determinants, transport, travel behavior, travel, choice, GIS, Hamilton CMA, spatial analysis, urban form, independent mobility, public transport, mode choice, transportation
2	Mobility, migration, residential mobility, age, home, distance, gender, care, place, population, spatial mobility, family, internal migration, context
3	Health, risk, aging, mortality, dynamics, disability, environment, human mobility, disease, impact, GPS, quality
4	Elderly, people, dementia, performance, gait, balance, falls