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 |