Cross-national analysis of social determinants of frailty among middle-aged and older adults: a machine learning study in the USA, England, and ChinaMay 30, 2025·Yan Luo,Mengzhuo Guo,Qingpeng Zhang· 0 min read Cite DOI URLTypeJournal articlePublicationHumanities and Social Sciences CommunicationsLast updated on Jun 13, 2025 AuthorsYan LuoPhD Candidate in Data Science Positive association between Internet use and mental health among adults aged ≥50 years in 23 countries Nov 18, 2024 →