{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T02:25:15Z","timestamp":1787192715371,"version":"build-2736575974"},"reference-count":42,"publisher":"Oxford University Press (OUP)","issue":"9","license":[{"start":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T00:00:00Z","timestamp":1785801600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,8,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Mounting evidence indicates that social frailty leads to adverse health outcomes in older adults. However, longitudinal trajectories of social frailty and their relationship with all-cause mortality have not been fully investigated. We analyzed the association between social frailty trajectories and all-cause mortality, and the mediating role of cognitive functioning in this relationship.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A nationally representative sample of older adults in South Korea was analyzed (n\u2009=\u20095941). Social frailty was measured multidimensionally through social activity, social networks, social support, loneliness, and living alone. Social frailty trajectories from 2006 to 2014 were identified using a growth mixture model. Subsequent change in cognitive functioning was assessed using the Mini-Mental State Examination. Participants were then followed for all-cause mortality through 2022. Cox regression was employed to assess the relationship between social frailty trajectory and all-cause mortality, using hazard ratios (HRs) and 95% confidence intervals (CIs). Mediation analysis was performed to assess the mediating role of poor cognitive functioning.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Two social frailty trajectories were identified: stable-low trajectory (n\u2009=\u20095065, 85.3%) and high-increasing trajectory (n\u2009=\u2009876, 14.7%). Compared to the stable-low social frailty trajectory, the high-increasing social frailty trajectory was linked to an elevated risk for all-cause mortality (HR = 1.32; 95% CI = 1.11-1.57). Subsequent poor cognitive functioning partially accounted for the excess hazard of all-cause mortality among those experiencing a high-increasing social frailty trajectory (proportion mediated: 20.8%, 95% CI: 10.5%-59.5%).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Experiencing an increasing social frailty trajectory was linked to elevated mortality risk in older adults, and subsequent poor cognitive functioning partially accounted for this association.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/gerona\/glag191","type":"journal-article","created":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T11:38:22Z","timestamp":1785843502000},"source":"Crossref","is-referenced-by-count":0,"title":["Longitudinal trajectories of social frailty and the risk of all-cause mortality among older adults in South Korea: exploration of the mediating role of cognitive 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