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- Title
Influenza-Associated Hospitalizations in the United States.
- Authors
Thompson, William W.; Shay, David K.; Weintraub, Eric; Brammer, Lynnette; Bridges, Carolyn B.; Cox, Nancy J.; Fukuda, Keiji
- Abstract
Context Respiratory viral infections are responsible for a large number of hospitalizations in the United States each year. Objective To estimate annual influenza-associated hospitalizations in the United States by hospital discharge category, discharge type, and age group. Design, Setting, and Participants National Hospital Discharge Survey (NHDS) data and World Health Organization Collaborating Laboratories influenza surveillance data were used to estimate annual average numbers of hospitalizations associated with the circulation of influenza viruses from the 1979-1980 through the 2000-2001 seasons in the United States using age-specific Poisson regression models. Main Outcome Measures We estimated influenza-associated hospitalizations for primary and any listed pneumonia and influenza and respiratory and circulatory hospitalizations. Results Annual averages of 94 735 (range, 18 908-193 561) primary and 133 900 (range, 30 757-271 529) any listed pneumonia and influenza hospitalizations were associated with influenza virus infections. Annual averages of 226 054 (range, 54 523-430 960) primary and 294,128 (range, 86 494-544 909) any listed respiratory and circulatory hospitalizations were associated with influenza virus infections. Persons 85 years or older had the highest rates of influenza-associated primary respiratory and circulatory hospitalizations (1194.9 per 100,000 persons). Children younger than 5 years (107.9 primary respiratory and circulatory hospitalizations per 100 000 persons) had rates similar to persons aged 50 through 64 years. Estimated rates of influenza-associated hospitalizations were highest during seasons in which A(H3N2) viruses predominated, followed by B and A(H1N1) seasons. After adjusting for the length of each influenza season, influenza-associated primary pneumonia and influenza hospitalizations increased over time among the elderly. There were no significant increases in influenza-associated primary respiratory and circulatory hos...
- Subjects
VIRUS diseases; INFLUENZA; HOSPITAL care; INFECTION; INFLUENZA viruses; PUBLIC health; INFLUENZA prevention
- Publication
JAMA: Journal of the American Medical Association, 2004, Vol 292, Issue 11, p1333
- ISSN
0098-7484
- Publication type
Article
- DOI
10.1001/jama.292.11.1333