Table 5 Characteristics of emerging space-time clusters of COVID-19 cases at machi-level in Nagasaki Prefecture from 2020/4/1 to 2021/9/8
Cluster | Period | Duration (Days) | Radius (km) | Observed Cases | Expected Cases | RR | P-value | Machi (Total) | Machi (RR > 1) | Population |
|---|---|---|---|---|---|---|---|---|---|---|
1 | 2021/7/26–2021/9/8 | 44 | 3.65 | 268 | 22.31 | 12.58 | < 0.001 | 77 | 49 | 65,595 |
2 | 2020/12/21–2021/9/8 | 261 | 2.39 | 556 | 133.16 | 4.54 | < 0.001 | 96 | 74 | 67,231 |
3 | 2021/1/3–2021/9/8 | 248 | 4.21 | 405 | 125.19 | 3.41 | < 0.001 | 31 | 19 | 66,506 |
4 | 2021/1/4–2021/9/8 | 247 | 1.87 | 252 | 69.81 | 3.74 | < 0.001 | 39 | 28 | 66,433 |
5 | 2021/8/4–2021/9/8 | 35 | 7.69 | 130 | 18.34 | 7.24 | < 0.001 | 42 | 16 | 67,402 |
6 | 2021/4/23–2021/9/8 | 138 | 6.11 | 232 | 68.43 | 3.5 | < 0.001 | 45 | 24 | 65,127 |
7 | 2021/8/1–2021/9/8 | 38 | 8.36 | 111 | 19.99 | 5.65 | < 0.001 | 69 | 21 | 67,786 |
8 | 2021/7/26–2021/9/8 | 44 | 11.65 | 115 | 23.24 | 5.03 | < 0.001 | 87 | 21 | 68,308 |
9 | 2021/8/2–2021/9/8 | 37 | 8.67 | 98 | 19.54 | 5.09 | < 0.001 | 87 | 25 | 68,027 |
10 | 2021/8/3–2021/9/8 | 36 | 4.86 | 86 | 18.6 | 4.68 | < 0.001 | 31 | 12 | 66,504 |
11 | 2021/8/16–2021/9/8 | 23 | 5.03 | 29 | 2.38 | 12.22 | < 0.001 | 22 | 3 | 13,143 |
13 | 2021/8/6–2021/9/8 | 33 | 11.81 | 54 | 17.33 | 3.14 | < 0.001 | 134 | 9 | 67,441 |
14 | 2021/8/16–2021/9/8 | 23 | 0 | 3 | 0.0089 | 337.64 | < 0.05 | 1 | 1 | 49 |