Clusters | Covering counties | Radius (km) | Number of cases | Expected cases | LLR | RR | P-value |
---|---|---|---|---|---|---|---|
Primary cluster (a) | Lanshan, Donggang, Junan, Wulian, Juxian, Hedong, Linshu, Yinan | 76.35 | 360 | 93.58 | 279.91 | 6.08 |  < 0.001 |
Secondary cluster 1 (b) | Juxian, Wulian, Yishui, Yinan, Donggang, Lanshan, Junan | 51.05 | 319 | 81.71 | 244.74 | 5.76 |  < 0.001 |
Secondary cluster 2 (c) | Huancui, Wendeng, Rongcheng, Zhifu, Fushan, Haiyang | 106.39 | 250 | 69.55 | 166.08 | 4.73 |  < 0.001 |
Secondary cluster 3 (d) | Hedong, Lanshan, Linshu | 30.55 | 122 | 81.32 | 10.08 | 1.59 | 0.001 |