Logistic regression analysis of factors1 independently associated with having coded influenza2 in the ED provisional diagnosis among persons with an any-cause ED presentation and a virological notification, New South Wales, 2005 to 2008.

Notes:1.Statistically significant results are shown in bold.2.Coded influenza in the ED database could include ICD-9 codes (487) or ICD-10 codes (J09-J11) for influenza, or equivalent SNOMED-CT concepts (see File S1).3.Of 1742 records, 230 (13%) records did not have a diagnosis recorded, did not have an influenza type A or B result, or did not have an address that could be classified according to remoteness, and were excluded from the analysis.4.Each variable was adjusted for all other variables in the table using logistic regression.