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SaTScan statistics for space–time clusters with significant higher incidence in Tai'an, 2006–2013
| Cluster type | Time frame | Town numbers | Observed cases | Expected cases | Relative risk | P value |
|---|---|---|---|---|---|---|
| Most likely | 1 Sept. 2009 to 30 Nov. 2012 | 4 | 166 | 11·83 | 20·67 | <0·001 |
| Secondary | 1 Oct. 2012 to 31 Oct. 2012 | 42 | 35 | 2·52 | 14·85 | <0·001 |
