{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T10:30:45Z","timestamp":1761129045420},"reference-count":11,"publisher":"American Society of Tropical Medicine and Hygiene","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2013,3,6]]},"abstract":"<jats:p>Pneumonia was the most common cause of death during the 2009 pandemic H1N1 influenza virus infection. Clinical risk factors for pneumonia caused by this virus are limited. We enrolled consecutive patients treated at the H1N1 Clinic in Thungsong Hospital in Nakhon Si Thammarat, Thailand, during June\u2013December 2009 who had positive polymerase chain reaction results for H1N1 virus. Clinical features for patients given a diagnosis with and without pneumonia were studied. There were 441 patients with positive polymerase chain reaction results for H1N1 virus. Of these patients, 51 (11.56%) had pneumonia. Three independent clinical factors for H1N1 pneumonia were myalgia, dyspnea, and an absolute neutrophil count &gt; 7,700 cells\/\u03bcL. Adjusted odds ratios (95% confidence intervals) for these three variables were 0.413 (0.173\u20130.988), 2.625 (1.230\u20135.604), and 4.475 (1.882\u201310.644), respectively. Clinical features may be a useful tool for predicting risk for pneumonia caused by H1N1 virus.<\/jats:p>","DOI":"10.4269\/ajtmh.12-0132","type":"journal-article","created":{"date-parts":[[2013,2,5]],"date-time":"2013-02-05T02:41:57Z","timestamp":1360032117000},"page":"461-463","source":"Crossref","is-referenced-by-count":7,"title":["Clinical Factors Predictive of Pneumonia Caused by Pandemic 2009 H1N1 Influenza Virus"],"prefix":"10.4269","volume":"88","author":[{"given":"Sawan","family":"Kanchana","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Supannakhon","family":"Kanchana","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Teerapon","family":"Vijitsopa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kreeta","family":"Thammakumpee","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sukit","family":"Yamwong","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kittisak","family":"Sawanyawisuth","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2795","reference":[{"key":"R1","series-title":"Scand J Infect Dis","first-page":"19","article-title":"Prevalence and clinical features of pneumonia in patients with laboratory-confirmed pandemic influenza A H1N1 2009 infection in South Korea","volume":"43","author":"Na","year":"2011"},{"year":"2009","series-title":"The Prevention of a New Strain of Influenza H1N1","author":"Department of Disease Control, Ministry of Public Health, Thailand","key":"R2"},{"key":"R3","series-title":"N Engl J Med","first-page":"2507","article-title":"Clinical Investigation Group of China, 2009. Clinical features of the initial cases of 2009 pandemic influenza A (H1N1) virus infection in China","volume":"361","author":"Cao","year":"2009"},{"key":"R4","series-title":"Influenza Other Respir Viruses","first-page":"e558","article-title":"Clinical factors predictive of PCR positive in pandemic H1N1 2009 influenza virus infection","volume":"5","author":"Phungoen","year":"2011"},{"key":"R5","series-title":"J Infect","first-page":"295","article-title":"Pandemic (H1N1) 2009 virus infection: persistent viral shedding after oseltamivir treatment","volume":"63","author":"Kanchana","year":"2011"},{"key":"R6","series-title":"N Engl J Med","first-page":"680","article-title":"Pneumonia and respiratory failure from swine-origin influenza A (H1N1) in Mexico","volume":"361","author":"Perez-Padilla","year":"2009"},{"key":"R7","series-title":"Am J Pathol","first-page":"199","article-title":"Excessive neutrophils and neutrophil extracellular traps contribute to acute lung injury of influenza pneumonitis","volume":"179","author":"Narasaraju","year":"2011"},{"key":"R8","series-title":"PLoS ONE","first-page":"e17618","article-title":"The role of neutrophils during mild and severe influenza virus infections of mice","volume":"6","author":"Tate","year":"2011"},{"key":"R9","series-title":"QJM","first-page":"311","article-title":"Clinical features, treatments and prognosis of the initial cases of pandemic influenza H1N1 2009 virus infection in Shanghai China","volume":"103","author":"Mu","year":"2010"},{"key":"R10","series-title":"J Korean Med Sci","first-page":"408","article-title":"Characteristics of hospitalized children with 2009 pandemic influenza A (H1N1): a multicenter study in Korea","volume":"27","author":"Ko","year":"2012"},{"key":"R11","series-title":"Wien Klin Wochenschr","first-page":"106","article-title":"Pneumonia in patients with novel influenza A (H1N1) virus in southeastern Turkey","volume":"123","author":"Ornek","year":"2011"}],"container-title":["The American Society of Tropical Medicine and Hygiene"],"original-title":[],"link":[{"URL":"https:\/\/www.ajtmh.org\/view\/journals\/tpmd\/88\/3\/article-p461.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.ajtmh.org\/downloadpdf\/journals\/tpmd\/88\/3\/article-p461.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/www.ajtmh.org\/downloadpdf\/journals\/tpmd\/88\/3\/article-p461.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,8,7]],"date-time":"2024-08-07T18:42:08Z","timestamp":1723056128000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ajtmh.org\/view\/journals\/tpmd\/88\/3\/article-p461.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,3,6]]},"references-count":11,"journal-issue":{"issue":"3"},"URL":"https:\/\/doi.org\/10.4269\/ajtmh.12-0132","relation":{},"ISSN":["0002-9637","1476-1645"],"issn-type":[{"type":"print","value":"0002-9637"},{"type":"electronic","value":"1476-1645"}],"subject":[],"published":{"date-parts":[[2013,3,6]]}}}