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Volume 21, Number 2—February 2015

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
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