{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T20:32:31Z","timestamp":1785529951673,"version":"3.56.0"},"reference-count":31,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"5","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["JAHA"],"published-print":{"date-parts":[[2026,3,3]]},"abstract":"<jats:sec xml:lang=\"en\">\n                    <jats:title>Background<\/jats:title>\n                    <jats:p xml:lang=\"en\">Multimorbidity is common in patients with atrial fibrillation (AF); however, the impact of the number and type of comorbid conditions on outcomes remains uncertain.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec xml:lang=\"en\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p xml:lang=\"en\">This cohort study included patients with new\u2010onset AF from a Midwest region between 2013 and 2017. Eighteen chronic conditions at the time of AF were classified into groups: cardiometabolic, other somatic, and mental health. Cox regression determined associations between the number of each condition type with death, ischemic stroke\/transient ischemic attack, and congestive heart failure, stratified by age.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec xml:lang=\"en\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p xml:lang=\"en\">Among 16\u2009509 patients with AF (mean age, 74\u2009years; 43% women), the mean number of cardiometabolic, other somatic, and mental health conditions was 2.7, 1.4, and 0.5, respectively. The number and type of conditions had a varying impact on outcomes and differed by age. A higher number of cardiometabolic conditions were associated with increased risk of death within 90\u2009days only in people aged \u226585\u2009years (\u22654 conditions versus 0: hazard ratio [HR], 1.74 [95% CI, 1.05\u20132.87]), whereas for death after 90\u2009days, associations were strongest in the youngest age group (&lt;65\u2009years: HR, 1.83 [95% CI, 1.35\u20132.46]; 65\u201374\u2009years: HR, 1.34 [95% CI, 1.04\u20131.73]; 75\u201384\u2009years: HR, 1.32 [95% CI, 1.09\u20131.60]; \u226585\u2009years: HR, 1.14 [95% CI, 0.96\u20131.35]). Associations with outcomes were generally strongest in the youngest age group and attenuated with older age for higher number of other somatic conditions, whereas the pattern was less consistent for mental health conditions.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec xml:lang=\"en\">\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p xml:lang=\"en\">Along with cardiometabolic\u2010related conditions, other somatic and mental health conditions are important predictors of outcomes in AF, with effects differing by age, and should be considered when caring for these patients.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1161\/jaha.124.040612","type":"journal-article","created":{"date-parts":[[2026,2,24]],"date-time":"2026-02-24T11:28:43Z","timestamp":1771932523000},"update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Multimorbidity in Atrial 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USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5605-900X","authenticated-orcid":false,"given":"Bernard J.","family":"Gersh","sequence":"additional","affiliation":[{"name":"Mayo Clinic","place":["Rochester, USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9347-7865","authenticated-orcid":false,"given":"V\u00e9ronique L.","family":"Roger","sequence":"additional","affiliation":[{"name":"Mayo Clinic","place":["Rochester, USA"]},{"name":"National Institutes of Health","place":["Bethesda, USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Euijung","family":"Ryu","sequence":"additional","affiliation":[{"name":"Mayo Clinic","place":["Rochester, USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3906-4020","authenticated-orcid":false,"given":"Jill M.","family":"Killian","sequence":"additional","affiliation":[{"name":"Mayo 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