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Table 3 Space-time clusters of TB case in Zhejiang, China from 2009/1/1 to 2012/12/31 (setting 50 % of the population as the maximum spatial cluster size)

From: Spatial and temporal analysis of tuberculosis in Zhejiang Province, China, 2009-2012

Cluster Cluster period Cluster center/Radius Number of counties in the Cluster Number of TB cases RR
Most likely cluster 2010/4/1 to 2011/12/31 (27.903440 N, 121.113042 E)/55.76 km 7 6375 1.67
Secondary cluster 1 2009/4/1 to 2010/6/30 (29.233899 N, 120.369091 E)/53.89 km 8 4515 1.34
Secondary cluster 2 2012/4/1 to 2012/12/31 (28.398269 N, 121.407348 E)/0 km 1 795 1.43
Secondary cluster 3 2011/10/1 to 2012/12/31 (29.613659 N, 121.364938 E)/40.49 km 5 3067 1.31
Secondary cluster 4 2011/7/1 to 2012/12/31 (30.171950 N, 120.383971 E)/29.73 km 7 5830 1.36
Secondary cluster 5 2009/1/1 to 2009/6/30 (30.523916 N, 120.871586 E)/58.71 km 11 2114 1.39
Secondary cluster 6 2009/7/1 to 2010/3/31 (29.186764 N, 118.319280E)/117.02 km 10 3873 1.48
Secondary cluster 7 2012/7/1 to 2012/9/30 (27.809978 N, 120.016669 E)/0 km 1 96 1.56
Secondary cluster 8 2009/1/1 to 2010/9/30 (30.978934 N, 119.808732 E)/53.02 km 5 3711 1.28
Secondary cluster 9 2011/10/1 to 2012/6/30 (27.426300 N, 120.433287 E)/0 km 1 486 1.27
Secondary cluster 10 2009/1/1 to 2009/3/31 (28.855321 N, 121.204335 E)/39.52 km 5 688 1.31
  1. Most likely cluster P value <0.001; Secondary cluster P values <0.05
  2. RR relative risk