Loneliness, Social Isolation, and Accumulation of Chronic Conditions: A Nationwide Longitudinal Study in Japan.
BACKGROUND Loneliness and social isolation are related but distinct dimensions of social disconnection, but their longitudinal associations with chronic condition accumulation remain unclear in non-Western populations. METHODS We analyzed 8,721 adults aged 18 years or older who completed the 2021 and 2025 waves of th...