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. 2022 Jul 26;80:176. doi: 10.1186/s13690-022-00921-3

Table 2.

Characteristics of emerging space-time clusters of COVID-19 cases at machi-level in Nagasaki Prefecture from 2020/4/1 to 2020/11/30

Cluster Period Duration (Days) Radius (km) Observed Cases Expected Cases RR P-value Machi (Total) Machi (RR > 1) Population
1 2020/8/2–2020/11/30 120 2.38 32 5.34 6.61 < 0.001 35 18 50,720
2 2020/8/2–2020/11/30 120 4.03 27 6.99 4.15 < 0.001 17 8 66,404
3 2020/8/2–2020/11/30 120 7.64 23 5.88 4.16 < 0.05 69 16 55,806
4 2020/8/24–2020/11/30 98 6.18 7 0.47 15.37 < 0.05 16 3 5408