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Table 3 The scanning results of Spatial-Temporal Clusters for serve HFMD cases among children in Chongqing, 2013–2018

From: Epidemiological and clinical characteristics of severe hand-foot-and-mouth disease (HFMD) among children: a 6-year population-based study

Cluster type Time frame Cluster areas Observed cases Expected cases Radius/(km2) RR LLR Specific districts p
Most likely 2015/1–2017/7 5 153 30.86 92.87 6.93 142.123460 Kaixian, Yunyang, Wanzhou, Chengkou, Liangping 0.001*
Secondary 2015/3–2015/7 1 50 1.18 0 47.58 141.361975 Fuling 0.001*
2nd Secondary 2018.7 4 11 0.54 17.55 20.75 22.766941 Yuzhong, Nanan, Dadukou. Jiangbei 0.001*
  1. Note: LLR Log likelihood ratio, RR Relative risk. * p < 0.01