Paño-Pardo, José RamónViasus, DiegoPachón, JerónimoCampins, AntoniLópez-Medrano, FranciscoVilloslada, AroaGutiérrez-Cuadra, ManuelPumarola, TomásToro, María Dolores delOteo, José AMartínez-Montauti, JoaquinGutiérrez-Aroca, JuanSegura, FerránCarratalà, Jordi2015-10-062015-10-062012-04Paño-Pardo JR, Viasus D, Pachón J, Campins A, López-Medrano F, Villoslada A, et al. Pandemic 2009 A(H1N1) infection requiring hospitalization of elderly Spanish adults. J Am Geriatr Soc. 2012 ; 60(4):740-40002-8614http://hdl.handle.net/10668/2006To describe the clinical presentation and prognosis of elderly adults hospitalized with pandemic 2009 A(H1N1) influenza infection and to compare these data with those of younger patients. DESIGN: Prospective, observational, multicenter study. SETTING: Thirteen hospitals in Spain. PARTICIPANTS: Adults admitted to the hospital with confirmed pandemic 2009 A(H1N1) influenza infection. MEASUREMENTS: Demographic, clinical, laboratory, radiological, and outcome variables. RESULTS: Between June 12 and November 10, 2009, 585 adults with confirmed 2009 A(H1N1) influenza were hospitalized, of whom 50 (8.5%) were aged 65 and older (median age 72, range 65-87). Older adults (≥ 65) were more likely to have associated comorbidities (88.0% vs 51.2%; P < .001), primarily chronic pulmonary diseases (46.0% vs 27.3%; P < .001). Lower respiratory tract symptoms and signs such as dyspnea (60.0% vs 45.6%) and wheezing (46.0% vs 27.8%; P = .007) were also more common in these elderly adults, although pulmonary infiltrates were present in just 14 (28.0%) of the older adults, compared with 221 (41.3%) of the younger adults (P = .06). Multilobar involvement was less frequent in elderly adults with pulmonary infiltrates than younger adults with pulmonary infiltrates (21.4% vs 60.0%; P = .05). Rhinorrhea (4.0% vs 21.9%; P = .003), myalgias (42.0% vs 59.1%; P = .01), and sore throat (14.0% vs 29.2%; P = .02) were more frequent in younger adults. Early antiviral therapy (<48 hours) was similar in the two groups (34.0% vs 37.9%; P = .58). Two older adults (4.0%) died during hospitalization, compared with 11 (2.1%) younger adults (P = .30). CONCLUSION: Elderly adults with 2009 A(H1N1) influenza had fewer viral-like upper respiratory symptoms than did younger adults. Pneumonia was more frequent in younger adults. No significant differences were observed in hospital mortality.enElderlyInfluenzaH1N1Clinical featuresPrognosisAntiviralesDisneaSubtipo H1N1 del Virus de la Influenza AMialgiaNeumoníaEstudios ProspectivosSistema RespiratorioEspañaMedical Subject Headings::Named Groups::Persons::Age Groups::AdultMedical Subject Headings::Named Groups::Persons::Age Groups::Adult::AgedMedical Subject Headings::Chemicals and Drugs::Chemical Actions and Uses::Pharmacologic Actions::Therapeutic Uses::Anti-Infective Agents::Antiviral AgentsMedical Subject Headings::Health Care::Health Care Quality, Access, and Evaluation::Quality of Health Care::Epidemiologic Factors::ComorbidityMedical Subject Headings::Diseases::Respiratory Tract Diseases::Respiration Disorders::DyspneaMedical Subject Headings::Information Science::Information Science::Data Collection::Vital Statistics::Mortality::Hospital MortalityMedical Subject Headings::Health Care::Health Care Facilities, Manpower, and Services::Health Services::Patient Care::HospitalizationMedical Subject Headings::Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::HumansMedical Subject Headings::Organisms::Viruses::RNA Viruses::Orthomyxoviridae::Influenzavirus A::Influenza A virus::Influenza A Virus, H1N1 SubtypeMedical Subject Headings::Diseases::Virus Diseases::RNA Virus Infections::Orthomyxoviridae Infections::Influenza, HumanMedical Subject Headings::Diseases::Virus Diseases::RNA Virus Infections::Orthomyxoviridae Infections::Influenza, HumanMedical Subject Headings::Diseases::Respiratory Tract Diseases::Respiratory Tract Infections::PharyngitisMedical Subject Headings::Diseases::Respiratory Tract Diseases::Lung Diseases::PneumoniaMedical Subject Headings::Analytical, Diagnostic and Therapeutic Techniques and Equipment::Diagnosis::PrognosisMedical Subject Headings::Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies::Cohort Studies::Longitudinal Studies::Prospective StudiesMedical Subject Headings::Diseases::Pathological Conditions, Signs and Symptoms::Signs and Symptoms::Signs and Symptoms, Respiratory::Respiratory SoundsMedical Subject Headings::Anatomy::Respiratory SystemMedical Subject Headings::Geographicals::Geographic Locations::Europe::Spainresearch article22462803open access10.1111/j.1532-5415.2012.03903.x1532-5415