{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T10:15:49Z","timestamp":1789035349510,"version":"build-2803163510"},"reference-count":64,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T00:00:00Z","timestamp":1788998400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000050","name":"National Heart, Lung, and Blood Institute","doi-asserted-by":"publisher","award":["R01HL136666"],"award-info":[{"award-number":["R01HL136666"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000050","name":"National Heart, Lung, and Blood Institute","doi-asserted-by":"publisher","award":["R35HL155466"],"award-info":[{"award-number":["R35HL155466"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000050","name":"National Heart, Lung, and Blood Institute","doi-asserted-by":"publisher","award":["R01HL123782"],"award-info":[{"award-number":["R01HL123782"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000049","name":"National Institute on Aging","doi-asserted-by":"publisher","award":["ZO1AG000949"],"award-info":[{"award-number":["ZO1AG000949"]}],"id":[{"id":"10.13039\/100000049","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000065","name":"National Institute of Neurological Disorders and Stroke","doi-asserted-by":"publisher","award":["NS041588"],"award-info":[{"award-number":["NS041588"]}],"id":[{"id":"10.13039\/100000065","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Bioinform."],"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Ischemic stroke (IS) is a leading cause of morbidity and mortality, and predicting events remains challenging. Polygenic risk scores (PRSs) aggregate genetic variants, but performance varies across ancestries and remains modest, particularly in non-European populations.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      We compared Bayesian PRS methods incorporating functional annotations and expanded linkage disequilibrium reference panels for IS prediction. PRSs were generated using PRS-CS with HapMap3 and TagIt panels, and SBayesRC integrating functional priors. Scores were optimized in 1,403 European ancestry (EA) and 6,342 African ancestry (AA) participants from the Reasons for Geographic and Racial Differences in Stroke (REGARDS) study and independently validated in All of Us participants (78,155 EA and 29,594 AA participants), a REGARDS holdout cohort (11,459 EA participants), and the Genetics of Hypertension Associated Treatments (GenHAT) study (6,908 AA participants). Predictive performance was evaluated using logistic regression adjusted for age, sex, the top 10 genetic principal components, and antihypertensive treatment assignment where applicable. Performance was assessed using odds ratios per standard deviation (OR\/SD), liability-scale R\n                      <jats:sup>2<\/jats:sup>\n                      , and area under the curve (AUC).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Among EA participants, SBayesRC demonstrated the largest effect size and liability R\n                      <jats:sup>2<\/jats:sup>\n                      in the REGARDS holdout validation cohort (OR\/SD = 1.24, 95% CI 1.12\u20131.36, R\n                      <jats:sup>2<\/jats:sup>\n                      = 2.42%). PRS-CS using the expanded TagIt panel (OR\/SD = 1.11, 95% CI 1.00\u20131.22) showed numerically stronger performance than the HapMap3 panel (OR\/SD = 1.09, 95% CI 0.98\u20131.20). Performance was consistent across the All of Us EA cohort, with OR\/SD ranging from 1.10 to 1.16 across methods. Among AA participants, associations and predictive metrics were attenuated, with no significant associations observed in All of Us. A modest association was observed for PRS-CS-TagIt in GenHAT (for an all-stroke outcome). PRSs modestly improved discrimination beyond covariate models among EA participants (AUCs up to 66.6%), but showed little to no improvement among AA participants (AUCs 62.7%\u201366.7%). High PRS percentile groups (e.g., top 2% versus 98%) showed modest stroke enrichment with high specificity and limited sensitivity.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Functional annotation-informed PRSs and expanded reference panels modestly improved prediction, particularly among EA participants. Limited performance among AA participants underscores the need for larger, more diverse genomic datasets and integrative models incorporating genetic, clinical, lifestyle, and social determinants of health.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fbinf.2026.1875388","type":"journal-article","created":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T10:02:06Z","timestamp":1789034526000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Evaluation of functional annotation-informed and ancestry-specific polygenic risk scores for ischemic stroke"],"prefix":"10.3389","volume":"6","author":[{"given":"Nicole D.","family":"Armstrong","sequence":"first","affiliation":[{"name":"Department of Epidemiology, University of Alabama at Birmingham","place":["Birmingham, AL, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vinodh","family":"Srinivasasainagendra","sequence":"additional","affiliation":[{"name":"Department of Biostatistics, University of Alabama at Birmingham","place":["Birmingham, AL, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amit","family":"Patki","sequence":"additional","affiliation":[{"name":"Department of Biostatistics, University of Alabama at Birmingham","place":["Birmingham, AL, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lavanya","family":"Pilla","sequence":"additional","affiliation":[{"name":"Department of Biostatistics, University of Alabama at Birmingham","place":["Birmingham, AL, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chad","family":"Aldridge","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Virginia","place":["Charlottesville, VA, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alana C.","family":"Jones","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, University of Alabama at Birmingham","place":["Birmingham, AL, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ulrich","family":"Broeckel","sequence":"additional","affiliation":[{"name":"Department of Pediatrics and Genomics Sciences and Precision Medicine Center, Medical College of Wisconsin","place":["Milwaukee, WI, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ethan M.","family":"Lange","sequence":"additional","affiliation":[{"name":"Department of Medicine, Anschutz Medical Campus, University of Colorado","place":["Aurora, CO, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leslie A.","family":"Lange","sequence":"additional","affiliation":[{"name":"Department of Medicine, Anschutz Medical Campus, University of Colorado","place":["Aurora, CO, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pankaj","family":"Arora","sequence":"additional","affiliation":[{"name":"Division of Cardiovascular Disease, University of Alabama at Birmingham","place":["Birmingham, AL, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nita A.","family":"Limdi","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Alabama at Birmingham","place":["Birmingham, AL, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hirotaka","family":"Iwaki","sequence":"additional","affiliation":[{"name":"Center for Alzheimer\u2019s and Related Dementias, National Institute on Aging","place":["Bethesda, MD, United States"]},{"name":"DataTecnica LLC","place":["Washington, DC, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lana","family":"Sargent","sequence":"additional","affiliation":[{"name":"Center for Alzheimer\u2019s and Related Dementias, National Institute on Aging","place":["Bethesda, MD, United States"]},{"name":"School of Nursing, Virginia Commonwealth University","place":["Richmond, VA, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joohyun","family":"Kim","sequence":"additional","affiliation":[{"name":"Division of Genetic Medicine, Vanderbilt Genetics Institute, Vanderbilt University Medical Center","place":["Nashville, TN, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maggie C. 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