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Table 2 Statistically significant spatio-temporal clusters of A(H7N9) human infections in China identified by use of the space–time permutation scan test with 5-days scanning unit (phase I)

From: Spatio-temporal pattern analysis for evaluation of the spread of human infections with avian influenza A(H7N9) virus in China, 2013–2014

Cluster Most likely cluster Secondary cluster 2
Location Longyan, Fuqing, Fuzhou, Nanchang, Taiwan, Tonggu, Wenzhou, Shaoyang Tianchang, Yancheng, Yangzhou, Jiangyin, Suqian, Nanjing, Wuxi, Changshu, Chuzhou, Suzhou, Kunshan, Shanghai
Province or region Fujian, Jiangxi, Taiwan, Zhejiang, Hunan Jiangsu, Anhui, Shanghai
Coordinates 25.12 N, 117.01 E 33.38 N, 120.13 E
Radius (km) 596.94 km 271.46 km
Time frame 2013 4/27–5/11 2013 3/13–4/11
Duration (days) 14 29
Oa 10 31
Eb 1.38 17.36
O / Ec 7.22 1.79
LLRd / Test statistic 11.451464 5.194351
P-valuee 0.0000055 0.044
  1. aNumber of cases observed per cluster
  2. bNumber of cases expected per cluster
  3. cObserved / Expected, Observed-to-expected ratio
  4. dLog Likelihood ratio
  5. eStatistical significance was evaluated using Monte Carlo hypothesis testing