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Epidemiol Infect. 2007 Aug;135(6):951-8. Epub 2006 Dec 7.

Estimating the undetected burden of influenza hospitalizations in children.

Author information

1
Department of Preventive Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232-2637, and Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, OH, USA.

Abstract

During the 2004-2005 influenza season two independent influenza surveillance systems operated simultaneously in three United States counties. The New Vaccine Surveillance Network (NVSN) prospectively enrolled children hospitalized for respiratory symptoms/fever and tested them using culture and RT-PCR. The Emerging Infections Program (EIP) and a similar clinical-laboratory surveillance system identified hospitalized children who had positive influenza tests obtained as part of their usual medical care. Using data from these systems, we applied capture-recapture analyses to estimate the burden of influenza related-hospitalizations in children aged<5 years. During the 2004-2005 influenza season the influenza-related hospitalization rate estimated by capture-recapture analysis was 8.6/10,000 children aged<5 years. When compared to this estimate, the sensitivity of the prospective surveillance system was 69% and the sensitivity of the clinical-laboratory based system was 39%. In the face of limited resources and an increasing need for influenza surveillance, capture-recapture analysis provides better estimates than either system alone.

PMID:
17156502
PMCID:
PMC2870647
DOI:
10.1017/S095026880600762X
[Indexed for MEDLINE]
Free PMC Article
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