Table 4 Spatio-temporal clustering of TB incidents in Qinghai, China, 2009–2016
Cluster type | Cluster time frame | Coordinates/Radius | N | Cluster counties | Observed cases | Expected cases | RR | LLR | P-value |
|---|---|---|---|---|---|---|---|---|---|
Most likely cluster | 2014/9/1 to 2016/12/31 | (32.91 N, 96.68 E)/261.34 km | 7 | Yushu, Nangqian, Chengduo, Zaduo, Maduo, Qumalai, Dari | 3916 | 991.33 | 4.21 | 2547.64 | <0.001 |
Secondary cluster 1 | 2014/10/1 to 2016/12/31 | (34.52 N, 101.57 E)/141.36 km | 6 | Henan, Zeku, Tongde, Tongren, Jiuzhi, Gande | 2069 | 794.40 | 2.68 | 723.22 | <0.001 |
Secondary cluster 2 | 2014/9/1 to 2016/12/31 | (34.87 N, 92.61 E) / 0 km | 1 | Zhiduo | 467 | 75.10 | 6.27 | 463.14 | <0.001 |
Secondary cluster 3 | 2014/12/1 to 2016/12/31 | (36.07 N, 102.23 E)/39.25 km | 2 | Hualong, Jianza | 953 | 585.25 | 1.64 | 98.34 | <0.001 |
Secondary cluster 4 | 2009/1/1 to 2010/8/31 | (38.32 N, 99.70 E)/109.59 km | 3 | Qilian, Gangcha, Tianjun | 346 | 209.32 | 1.66 | 37.41 | <0.001 |
Secondary cluster 5 | 2012/2/1 to 2014/3/31 | (37.46 N, 101.70 E)/0 km | 1 | Menyuan | 471 | 338.24 | 1.40 | 23.37 | <0.001 |
Secondary cluster 6 | 2015/1/1 to 2016/8/31 | (36.45 N, 100.03 E)/93.93 km | 2 | Gonghe, Haiyan | 405 | 290.12 | 1.40 | 20.36 | <0.001 |
Secondary cluster 7 | 2015/4/1 to 2016/5/31 | (36.15 N, 102.77 E)/0 km | 1 | Minhe | 573 | 440.34 | 1.30 | 18.42 | <0.001 |