Table 3.

Spatio-temporal clustering of human Brucellosis in Shandong province, 2015–2021

Cluster	Cluster areas	Cluster center/radius(km)	Period	Number of cases	Expected cases	RR	LLR	P value
Most likely cluster	37	37.88 N,118.52E/167.91	2015/1/1 to 2017/12/31	5498	2514	2.52	1526.24	< 0.0001
Secondary cluster	2	35.66 N, 117.25E/ 25.56	2019/1/1 to 2021/12/31	412	100	4.17	273.19	< 0.0001
2nd secondary cluster	3	35.07 N, 115.57E/ 27.39	2016/1/1 to 2018/12/31	709	278	2.59	236	< 0.0001