Factors relating to social isolation in urban Japanese older people: A 2-year prospective cohort study

Purpose: We analyzed the data from a 2-year prospective-cohort survey to identify factors relating to new incidences of social isolation and recovery from social isolation in community-dwelling older people. Materials and methods: We conducted a longitudinal study (2013-2015) involving 2657 older residents of Iriarai, Japan. A chi-square test, an independent t-test, and logistic regression analysis with imputed data were conducted to examine categorical data, continuous variables, and factors relating to social isolation, respectively. Principal results: The results suggested that the factors that predicted future social isolation included being a man, being older, living with others, having a decline in mental health, having a lower frequency of going out, and not participating in community groups. On the other hand, being younger, having a higher level of mental health, having a higher frequency of going out, and participating in community groups were identified as factors that predicted participants' recovery from social isolation. Major conclusions: Some demographic, mental, and social factors could relate to new incidences of social isolation and recovery from social isolation in community-dwelling older people. As aging is an irreversible phenomenon, and there is a limit to preventing all disorders, either building a safety net or introducing exchange programs to prevent social isolation are important interventions for older people.