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Table 2 Space-time PTB clusters in Zhaotong in the period 2011/1/1–2015/12/31

From: Space-time clustering and associated risk factors of pulmonary tuberculosis in southwest China

Cluster type Time period Centre and radius (km) Areas covered (n) Observed cases (n) Expected cases (n) RRa P-value
Most likely cluster 2013/3/1–2015/8/31 Wufeng 45.51 29 5994 3418 2.01 < 0.001
Secondary cluster 1 2014/4/1–2014/6/30 Fenghuang 7.06 3 155 45 3.47 < 0.001
Secondary cluster 2 2011/2/1–2013/7/31 Dousha 13.76 3 362 214 1.70 < 0.001
Secondary cluster 3 2011/3/1–2012/10/31 Cuihua 0 1 119 58 2.06 < 0.001
Secondary cluster 4 2015/12/1–2015/12/31 Zhongming 9.04 2 23 6 3.91 0.030
Secondary cluster 5 2012/2/1–2012/5/31 Xiluodu 17.84 4 81 45 1.82 0.162
Secondary cluster 6 2012/1/1–2012/7/31 Baihetan 0 1 86 51 1.68 0.704
  1. aRelative risk