Period | Cluster | Aggregation time | No. of observed cases | No. of expected cases | Relative risk | LLR | P value |
---|---|---|---|---|---|---|---|
2005–2012 | I | 2008/8/1–2008/11/30 | 46 | 0.04 | 1,321.4 | 282.7 | < 0.01 |
II | 2010/7/1–2012/12/31 | 223 | 66.4 | 4.8 | 140.4 | < 0.01 | |
2013–2019 | I | 2014/8/1–2017/12/31 | 1,986 | 8.6 | 282.1 | 9,019.8 | < 0.01 |
II | 2019/5/1–2019/11/30 | 3,266 | 463.8 | 9.7 | 3,991.1 | < 0.01 |