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Volume 21, Number 2—February 2015
Research

Refining Historical Limits Method to Improve Disease Cluster Detection, New York City, New York, USA

Alison Levin-Rector1Comments to Author , Elisha L. Wilson2, Annie D. Fine, and Sharon K. Greene
Author affiliations: New York City Department of Health and Mental Hygiene, Queens, New York, USA

Main Article

Table 1

Case statuses in current and baseline periods included in HLMoriginal and HLMrefined, New York City, New York, USA*

Case status Included in HLMoriginal Included in HLMrefined
Confirmed Yes Yes
Probable Yes Yes
Suspected Yes Yes
Pending† Yes Yes
Unresolved No Yes
“Not a case” No Yes
Chronic carrier No Yes
Asymptomatic infection No Yes
Seroconversion 1 y No Yes
Not applicable No Yes
Contact No No
Possible exposure No No

*HLM, historical limits method; HLMoriginal, method as originally applied in New York City before May 20, 2013; HLMrefined, refined method applied starting May 20, 2013.
†Pending is a transient status that in the normal course of case investigations can be assigned to a case in the current period but not in the baseline period.

Main Article

1Current affiliation: RTI International, Research Triangle Park, North Carolina, USA.

2Current affiliation: Colorado Department of Public Health and Environment, Denver, Colorado, USA.

Page created: January 20, 2015
Page updated: January 20, 2015
Page reviewed: January 20, 2015
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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