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Although frailty has been recognized as a potential risk factor, previous studies relying on static assessments cannot capture its dynamic nature. This study aims to prospectively evaluate the association between dynamic frailty trajectories and incident AMD. The baseline cohort included 462,573 UK Biobank participants who were free of AMD and had frailty phenotype (FP) data at enrollment. Among them, 53,059 with at least one follow-up FP assessment comprised the trajectory cohort. Participants were categorized as nonfrail, prefrail, or frail based on their FP scores. Annualized frailty progression (\u0394FP\/year) was estimated via linear regression. Cox models assessed hazard ratios (HRs) and 95% confidence intervals (CIs) for AMD. During a median follow-up of 11.8\u00a0years in the baseline cohort, 13,428 incident AMD cases (2.9%) were documented. Prefrail (HR:1.14; 95% CI:1.10\u20131.18) and frail (HR:1.36; 95% CI: 1.26\u20131.47) individuals had significantly higher AMD risks compared to nonfrail participants. In the frailty trajectory analysis with a median follow-up duration of 3.3\u00a0years, 852 incident AMD cases (1.6%) were recorded. Each 1-point FP increase conferred 28% higher AMD risk (HR: 1.28; 95% CI: 1.18\u20131.38), while each 0.1-point\/year \u0394FP increase independently elevated risk by 15% (HR: 1.15; 95% CI: 1.10\u20131.21). Compared to stable nonfrail, prefrailty aggravation showed highest AMD risk (HR: 2.26; 95% CI: 1.51\u20133.37), followed by frailty alleviation (HR: 1.73; 95% CI: 0.98\u20133.04) and frailty maintenance (HR: 1.72; 95% CI: 0.86\u20133.41). Progressive frailty trajectories, independent of baseline status, is associated with increased incident AMD risk. Early interventions targeting frailty progression may mitigate AMD risk in aging populations.<\/jats:p>","DOI":"10.1007\/s11357-025-02066-x","type":"journal-article","created":{"date-parts":[[2026,1,3]],"date-time":"2026-01-03T07:19:14Z","timestamp":1767424754000},"page":"7681-7691","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Dynamic frailty trajectories and risk of age-related macular degeneration: a prospective cohort study in UK Biobank"],"prefix":"10.1007","volume":"48","author":[{"given":"Yu","family":"Peng","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuzhou","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ka Wai","family":"Kam","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mary","family":"Ho","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon","family":"Sezto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sunny","family":"Au","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charlene C.","family":"Yim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiujuan","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mandy P. 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