Chronic medical conditions, presenting signs and symptoms, laboratory testing, and chest X-ray results among persons with fatal and non-fatal influenza A(H5N1) virus infections.

<p>N/a: not applicable;</p><p>*unadjusted OR and 95% CI of a fatal H5N1 outcome among H5N1 cases;</p>†<p>dyspnea: defined as any recorded difficulty breathing or shortness of breath in any age group, or in a child less than age 5, the presence of stridor or chest in-drawing;</p>§<p>altered mental status: defined as any recorded presence of altered mental status, confusion, or unconsciousness;</p>¶<p>pneumonia: defined as the presence of alveolar infiltrates, interstitial infiltrates, or lobar consolidation on chest X-ray;</p><p>**not possible to calculate an unadjusted OR.</p

Comparison of clinical characteristics between persons with fatal influenza A(H5N1) virus infection and fatal human influenza virus infection.

<p>N/a: not applicable;</p><p>*unadjusted OR and 95% CI of a fatal H5N1 outcome versus a fatal human influenza outcome;</p>†<p>dyspnea: defined as any recorded difficulty breathing or shortness of breath in any age group, or in a child less than age 5, the presence of stridor or chest in-drawing;</p>§<p>altered mental status: defined as any recorded presence of altered mental status, confusion, or unconsciousness;</p>¶<p>pneumonia: defined as the presence of alveolar infiltrates, interstitial infiltrates, or lobar consolidation on chest X-ray;</p><p>**not possible to calculate an unadjusted OR.</p

Characteristics of patients hospitalized with influenza-associated acute lower respiratory infection – Sa Kaeo and Nakhon Phanom, Thailand, January 2009 – December 2010. Values represent n (%) unless otherwise stated.

¥<p>Pearson chi-square test for homogeneity, excluding influenza A cases without subtype.</p>a<p>Kruskal-Wallis test, excluding influenza A cases without subtype.</p>*<p>Among those tested for <i>Streptococcus pneumoniae</i> by the Binax® urine antigen assay.</p>b<p>One A(H1N1)pdm09-infected patient was also positive for adenovirus and RSV.</p>c<p>One patient with <i>Staphylococcus aureus.</i></p>d<p>One patient positive for both influenza A(H1N1)pdm09 and A(H3N2) tested positive for <i>Streptococcus pneumoniae.</i></p><p>CXR, chest x-ray.</p

Incidence rate of influenza-associated acute lower respiratory infection hospitalizations.

<p><u>Detailed legend</u>. Incidence rate of influenza-associated acute lower respiratory infection hospitalizations, by type/subtype, Sa Kaeo and Nakhon Phanom provinces, Thailand, January 2009–December 2010. Bars show 95% confidence intervals Rates are adjusted for sampling and non-participation.</p

Hospitalized cases of influenza-associated acute lower respiratory infection by month of admission.

<p><u>Detailed legend</u>. Hospitalized cases of influenza-associated acute lower respiratory infection by month of admission – Sa Kaeo and Nakhon Phanom, Thailand, January 2009 – December 2010. Cases with more than one influenza type or subtype are included in each category: three cases positive for influenza B and A (H1N1pdm09, H3N2, H1N1), one case positive for influenza A (H1N1)pdm09 and A (H3N2).</p