Volume 8, Number 12, December 2002

Binary Cumulative Sums and Moving Averages in Nosocomial Infection Cluster Detection1

Samuel M. Brown,* James C. Benneyan,† Daniel A. Theobald,‡ Kenneth Sands,§ Matthew T. Hahn,‡ Gail A. Potter-Bynoe,¶ John M. Stelling,#** Thomas F. O'Brien,#** and Donald A. Goldmann¶
*Massachusetts General Hospital, Boston, Massachusetts, USA; †Northeastern University, Boston, Massachusetts, USA; ‡Vecna Technologies, Inc., Hyattsville, Maryland, USA; §Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA; ¶Children's Hospital, Boston, Massachusetts, USA; #WHO Collaborating Center for Antimicrobial Resistance Surveillance, Boston, Massachusetts, USA; and **Brigham and Women's Hospital, Boston, Massachusetts, USA

Figure 4. Cumulative sum test iteration detecting an outbreak of vancomycin-resistant enterococcus. Test parameters were p0 = 0.05, p1 = 0.15, = 0.15, ß = 0.2, and included enterococcal isolates from all body sites from the affected wards, excluding strains found during outbreak investigation.

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Emerging Infectious Diseases Journal
National Center for Infectious Diseases
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