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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 1

Characteristics of patients hospitalized with influenza, Colorado, USA, 2004–08 influenza seasons*

Characteristics Influenza season (October 1–May 31), no. (%) patients
2004–05 2005–06 2006–07 2007–08
Total recorded cases
978
848
367
1,004
Influenza type
A 777 (79.45) 699 (82.43) 345 (94.01) 629 (62.65)
B 127 (12.99) 110 (12.97) 12 (3.27) 343 (34.16)
Unknown
74 (7.57)
39 (4.60)
10 (2.72)
32 (3.19)
Age
<6 mo 64 (6.54) 81 (9.55) 39 (10.63) 79 (7.87)
6–23 mo 72 (7.36) 103 (12.15) 46 (12.53) 78 (7.77)
2–4 y 56 (5.73) 59 (6.96) 27 (7.36) 65 (6.47)
5–17 y 56 (5.73) 72 (8.49) 29 (7.90) 74 (7.37)
18–49 y 140 (14.31) 86 (10.14) 78 (21.25) 180 (17.93)
50–64 y 149 (15.24) 103 (12.15) 39 (10.63) 142 (14.14)
65–79 y 201 (20.55) 169 (19.93) 56 (15.26) 179 (17.83)
>80 y
240 (24.54)
175 (20.64)
53 (14.44)
207 (20.62)
Gender
M 488 (49.90) 405 (47.76) 186 (50.68) 461 (45.92)
F 485 (49.59) 443 (52.24) 180 (49.05) 517 (51.49)
Unknown
5 (0.51)
0 (0.00)
1 (0.27)
26 (2.59)
Region*
Western Slope 57 (5.83) 100 (11.79) 31 (8.45) 94 (9.36)
Northern Front Range 122 (12.47) 108 (12.74) 48 (13.08) 121 (12.05)
Denver Metro 550 (56.24) 383 (45.17) 210 (57.22) 520 (51.79)
South Central 36 (3.68) 32 (3.77) 8 (2.18) 14 (1.39)
San Luis Valley 7 (0.72) 8 (0.94) 12 (3.27) 15 (1.49)
Southern Front Range 174 (17.79) 177 (20.87) 48 (13.08) 205 (20.42)
Eastern Plains 32 (3.27) 40 (4.72) 10 (2.72) 35 (3.49)

*Colorado regions can be further divided into counties: Western Slope: Archuleta, Delta, Dolores, Eagle, Garfield, Grand, Gunnison, Hinsdale, Jackson, La Plata, Mesa, Moffat, Montezuma, Montrose, Ouray, Pitkin, Rio Blanco, Routt, San Juan, San Miguel, Summit; Northern Front Range: Larimer, Weld; Denver Metro: Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, Jefferson; South Central: Chaffee, Clear Creek, Custer, Fremont, Gilpin, Huerfano, Lake, Las Animas, Park, Teller; San Luis Valley: Alamosa, Conejos, Costilla, Mineral, Rio Grande, Saguache; Southern Front Range: El Paso, Pueblo, and Eastern Plains: Baca, Bent, Cheyenne, Crowley, Elbert, Kiowa, Kit Carson, Lincoln, Logan, Morgan, Otero, Phillips, Prowers, Sedgwick, Washington, Yuma.

Main Article

Page created: December 08, 2010
Page updated: December 08, 2010
Page reviewed: December 08, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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