Volume 10, Number 5—May 2004
Research
Syndromic Surveillance in Public Health Practice, New York City
Richard Heffernan*, Farzad Mostashari*, Debjani Das*, Adam Karpati*, Martin Kulldorff†, and Don Weiss*
Table 3
Summary of signals based on the temporal and spatial scan statistics, (p<0.01) November 15, 2001–November 14, 2002
| Analysis/syndrome | No. signals | Mean observed/expected cases in cluster | Mean relative risk | Mean excess cases in cluster |
|---|---|---|---|---|
| Citywide temporal analysis | ||||
| Respiratory (age >13 y) | ||||
| 1-day | 1 | 283/224 | 1.3 | 59 |
| 2-day | 8 | 770/673 | 1.1 | 96 |
| 3-day | 13 | 1,107/984 | 1.1 | 123 |
| Fever (age >13 y) | ||||
| 1-day | 3 | 225/166 | 1.4 | 59 |
| 2-day | 6 | 418/332 | 1.3 | 85 |
| 3-day | 13 | 591/497 | 1.2 | 94 |
| Diarrhea | ||||
| 1-day | 3 | 129/83 | 1.6 | 46 |
| 2-day | 6 | 283/219 | 1.3 | 64 |
| 3-day | 9 | 423/349 | 1.2 | 73 |
| Vomiting | ||||
| 1-day | 6 | 232/175 | 1.3 | 58 |
| 2-day | 6 | 448/359 | 1.2 | 88 |
| 3-day | 12 | 741/635 | 1.2 | 106 |
| Hospital spatial analysis | ||||
| Respiratory (age >13 y) | 11 | 71/44 | 1.6 | 27 |
| Fever (age >13 y) | 14 | 32/16 | 2.0 | 16 |
| Diarrhea | 17 | 26/12 | 2.2 | 14 |
| Vomiting | 17 | 38/20 | 1.9 | 18 |
| Zip code spatial analysis | ||||
| Respiratory (age >13 y) | 4 | 56/33 | 1.7 | 23 |
| Fever (age >13 y) | 14 | 18/6 | 3.0 | 12 |
| Diarrhea | 10 | 17/6 | 2.8 | 11 |
| Vomiting | 11 | 23/9 | 2.6 | 14 |
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