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.

¥Pearson chi-square test for homogeneity, excluding influenza A cases without subtype.aKruskal-Wallis test, excluding influenza A cases without subtype.*Among those tested for Streptococcus pneumoniae by the Binax® urine antigen assay.bOne A(H1N1)pdm09-infected patient was also positive for adenovirus and RSV.cOne patient with Staphylococcus aureus.dOne patient positive for both influenza A(H1N1)pdm09 and A(H3N2) tested positive for Streptococcus pneumoniae.CXR, chest x-ray.