This study explores how urban community support systems (CSS)—including healthcare access, social engagement, and environmental safety—shape healthy aging (physical function, mental well-being) and longevity among older adults (≥65 years) across high-income (U.S., Japan, Spain), middle-income (China), and low-income (Nigeria) urban contexts. Using panel data (2021–2024) from 12,000 older adults in 15 cities and a mixed-methods... more

This study investigates how digital health tools (DHTs)—including mobile health apps, wearable devices, and telemedicine platforms—influence chronic disease management (CDM), healthy aging, and longevity among urban older adults (≥65 years) with at least one chronic condition (diabetes, hypertension, or heart disease). Using 2021–2024 panel data from 15,000 participants across 10 cities (U.S. [Boston, New York];... more

This study explored Community Mutual Aid Models (CMAMs)’ impact on health of urban elderly living alone (≥65 years) in 12 cities across 8 countries. With 2021–2024 longitudinal data from 8,000 participants and mixed methods, results showed: 1) CMAM participation reduced physical frailty risk by 38% (OR=0.62, p<0.001) and depression by 45% (PHQ-9 reduction: 5.2±1.8, p<0.001);... more

This study examines the effects of urban community elderly canteens (UCECs) on physical health, nutritional status, and social integration among 10,000 urban elderly living alone (≥65 years) across 15 cities in 10 countries. Using 2022–2025 longitudinal data and mixed methods, results show: (1) Regular UCEC use (≥3 meals/week) reduces malnutrition risk by 52% (OR=0.48, p<0.001),... more

This study explored digital health tools (DHTs)’ impact on health self-management and chronic disease control among 8,000 community-dwelling elderly (≥65 years) in 12 cities across 8 countries.Using 2023–2026 longitudinal data and mixed methods (quantitative regression, 350 interviews), results showed: 1) Regular DHT use (≥5 times/week) raised self-management scores by 42% (β=0.42, p<0.001), reduced HbA1c by... more