Volume 21, Number 2—February 2015
Research
Refining Historical Limits Method to Improve Disease Cluster Detection, New York City, New York, USA
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.
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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