Influence of social relationship domains and their combinations on incident dementia: a prospective cohort study

摘要: Background Social relationships consist of mutually related but distinct dimensions. It remains unclear how these domains independently contribute to incident dementia. This large-scale, prospective cohort study examines associations between the social relationship as well their combinations and dementia among community-dwelling older adults. Methods We analysed data from 13 984 adults aged 65+ without long-term care needs living in Aichi prefecture Japan. Incident was assessed based on Long-term Care Insurance records, followed for 3436 days baseline survey conducted 2003. Three (social support, networks activities) were further divided into a total eight subdomains. A diversity score calculated using which significantly Results Cox proportional hazards model showed that being married, exchanging support with family members, having contact friends, participating community groups engaging paid work lower likelihood developing dementia, controlling covariates other domains. The scores, ranging 0 5, linearly associated (p Conclusions Our findings revealed five subdomains negatively suggesting may potentially be prevented by enhancing relationships. Future studies should examine independent pathways each domain