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Volume 15, Number 6—June 2009

Research

Case-based Surveillance of Influenza Hospitalizations during 2004–2008, Colorado, USA

Rosemary Proff, Ken GershmanComments to Author , Dennis Lezotte, and Ann-Christine Nyquist
Author affiliations: University of Colorado Denver, Colorado, USA (R. Proff, D. Lezotte, A-C. Nyquist); Colorado Department of Public Health and Environment, Denver (K. Gershman)

Main Article

Table 3

Rates of influenza hospitalizations per 100,000 population, by age group, Colorado, USA, 2004–08

Age group Influenza season (October 1–May 31), no. cases/100,000
2004–05 2005–06 2006–07 2007–08
<6 mo 185.6 234.6 111.8 225.4
6–23 mo 104.3 148.9 66.0 110.5
2–4 y 27.9 28.4 12.8 30.3
5–17 y 6.7 8.6 3.4 8.5
18–49 y 6.2 3.8 3.4 7.8
50–64 y 19.4 12.8 4.6 16.1
65–79 y 59.4 49.0 15.9 49.5
>80 y
214.4
153.6
45.7
174.5
Overall rate (all age groups) 21.2 18.1 7.7 20.6

Main Article

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