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Proportion of outbreaks in statistically significant and non-significant space–time clusters of domestically acquired typhoid fever, United States, 1999–2010*
| Space–time clusters | |||
|---|---|---|---|
| P < 0·05 | P > 0·05 | Total | |
| No. of detected clusters | 18 | 27 | 45 |
| No. (%) outbreaks in clusters | 14 (78%) | 12 (44%) | 26 (58%) |
| No. (%) outbreaks and possible outbreaks in clusters | 16 (89%) | 12 (44%) | 28 (62%) |
Space–time clusters were identified in cases reported to the National Typhoid and Paratyphoid Fever Surveillance.
