Figure 35: Number of confirmed influenza A(H1N1)pdm09 cases admitted to an ICU, Australia, 2009, by age group and risk factor* This figure presents ANZICS data on the number of confirmed influenza A(H1N1)pdm09 cases admitted to an ICU during 2009 by age group and risk factor. In comparison to hospitalisations captured in the NetEpi combined dataset, the age distribution of influenza A(H1N1)pdm09 ICU admissions varied substantially; with the median age of ICU admissions being much older (30 versus 42 years respectively). This figure also highlights that the proportion of cases with a risk factor generally increased with increasing age, with a peak additionally noted in the 20-24 years age group.