{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T14:19:47Z","timestamp":1788185987993,"version":"build-2803163510"},"reference-count":30,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T00:00:00Z","timestamp":1773619200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Public Health"],"abstract":"<jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To describe the clinical characteristics of adults hospitalized with respiratory syncytial virus (RSV) in Spain over six epidemiological seasons (2016\u20132017 to 2021\u20132022) and identify factors associated with ICU admission, prolonged length of stay, and in-hospital mortality (IHM).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Retrospective, population-based study in adults (\u226515 years) hospitalized for RSV and included in the Spanish hospital discharge database (containing all records of hospitalizations in Spain). Factors linked to ICU admission, prolonged length of stay, and IHM were assessed using multivariable logistic regression.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>A total of 20,695 adults (56.5% women) were hospitalized with RSV. Case numbers increased until 2018\u20132019, then declined during the COVID-19 pandemic. Patients aged 15\u201364 years accounted for 20.9% of the sample; 65\u201379 years, 31.2%; and \u226580 years, 47.9%. Common comorbidities included hypertension (61.3%), diabetes (28.0%), and heart failure (26.1%). ICU admission (6.4% of cases) was independently associated with age 15\u201364 years (adjusted odds ratio [aOR] 5.04, 95% confidence interval [CI] 4.21\u20136.03), COVID-19 co-infection (aOR 5.06, 95% CI 2.88\u20138.87), and RSV pneumonia (aOR 2.19, 95% CI 1.48\u20133.27). IHM increased with age (15\u201364 years: 4.0%; 65\u201379 years: 6.2%, aOR 1.67, 95% CI 1.37\u20132.04; and \u226580 years: 9.5%, aOR 3.32, 95% CI 2.73\u20134.04). Other key risk factors were ICU admission (aOR 6.23, 95% CI 5.30\u20137.33), leukemia (aOR 3.31, 95% CI 2.11\u20134.59), and neoplasm (aOR 2.90, 95% CI 2.43\u20133.47).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>RSV represents a significant and growing burden among hospitalized adults, particularly in older individuals and those with underlying comorbidities, who experience worse outcomes and higher mortality. These findings underscore the importance of prevention strategies, including vaccination of adults aged \u226560 years and high-risk groups.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fpubh.2026.1781582","type":"journal-article","created":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T06:37:24Z","timestamp":1773643044000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Adult RSV hospitalizations in Spain: clinical characteristics and risk factors for ICU admission, prolonged stay, and mortality across six seasons (2016\u20132017 to 2021\u20132022)"],"prefix":"10.3389","volume":"14","author":[{"given":"Jos\u00e9-Manuel","family":"Ramos-Rinc\u00f3n","sequence":"first","affiliation":[{"name":"Internal Medicine Department, Dr. Balmis General University Hospital, Alicante Institute for Health and Biomedical Research (ISABIAL)","place":["Alicante, Spain"]},{"name":"School of Medicine, Miguel 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