Volume 12, Number 1, January 2006

Estimating Influenza Hospitalizations among Children

Carlos G. Grijalva,* Allen S. Craig,*† William D. Dupont,* Carolyn B. Bridges,‡ Stephanie J. Schrag,‡ Marika K. Iwane,‡ William Schaffner,* Kathryn M. Edwards,* and Marie R. Griffin*
*Vanderbilt University School of Medicine; Nashville, Tennessee, USA; †Tennessee Department of Health, Nashville, Tennessee, USA; and ‡Centers for Disease Control and Prevention, Atlanta, Georgia, USA

Figure 1. Capture-recapture estimation using data from 2 independent sources. The first surveillance system (New Vaccine Surveillance Network [NVSN]) captured n1 cases. The second system (Emerging Infections Program [EIP]) captured n2 cases, including m2 cases already captured by NVSN (matched cases). The Peterson estimator of N (total cases) is  = n1 × n2/m2. The Peterson estimate implies that the estimated number of cases missed by both systems (z) = (b × c)/(a); where b is the number of enrolled cases by the EIP only, c is the number of enrolled cases by the NVSN only, and a is the number of matched cases (m2) (21–25).

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This page last reviewed December 21, 2005

Emerging Infectious Diseases Journal
National Center for Infectious Diseases
Centers for Disease Control and Prevention