The distribution of hepatitis C virus infection in Shanghai, China: a time-spatial study

BMC Infectious Diseases

Table 2 HCV infection spatiotemporal clusters with high rates identified by SaTScan discrete Poisson method, Shanghai, China, 2005–2018

Cluster	1	2	3	4	5
Time period	2006–2010	2017–2018	2016–2018	2015–2017	2016–2017
Annual incidence. obs (/100,000)	1.40	100.98	12.78	42.83	32.59
Annual incidence. exp (/100,000)	0.67	7.17	7.18	7.17	7.18
RR	2.71	14.42	1.94	6.04	4.58
LLR	236.13	462.88	292.12	148.68	86.19
P value	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
No. communities	102	1	43	1	1

Cluster 1 belongs to primary clusters of acute HCV infection;
Cluster 2 belongs to primary clusters of chronic HCV infection, and cluster 3, 4 and 5 belong to secondary clusters of chronic HCV infection;
Annual incidence. Obs, annual incidence/prevalence of observed cases;
Annual incidence. Exp, annual incidence/prevalence of expected cases;
RR, relative risk for the HCV incidence in the cluster compared to the national average incidence at the same time period;
LLR, log likelihood ratio;
No. communities, number of communities within cluster

ISSN: 1471-2334