Bar chart; rate per 100,000 population, influenza season; Rate per 100,000 was 16.1 in the September 2005 through March 2006 influenza season Rate per 100,000 was 9.7 in the September 2006 through March 2007 influenza season Rate per 100,000 was 25.9 in the September 2007 through March 2008 influenza season Rate per 100,000 was 8.8 in the September 2008 through March 2009 influenza season Rate per 100,000 was 36.8 in the September 2009 through March 2010 influenza season

Figure 2Rates* of hospitalizations for influenza during the influenza season,** 2005–2010

* The rates are based on hospitalizations that occurred September through March (influenza season). Denominator data for rates were based on the U.S. Census Bureau, National Intercensal Estimates, 2000–2010.

** Influenza season is defined as September through March.

Source: AHRQ, Center for Delivery, Organization, and Markets, Healthcare Cost and Utilization Project, Nationwide Inpatient Sample, 2005–2010

From: Emergency Department Visits and Hospital Inpatient Stays for Seasonal and 2009 H1N1 Influenza, 2008–2009

Cover of Healthcare Cost and Utilization Project (HCUP) Statistical Briefs
Healthcare Cost and Utilization Project (HCUP) Statistical Briefs [Internet].

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