Table 1.
Space-time clusters of ASF from 2019 to 2020 in Vietnam (space window: 10% at risk).
| Cluster No. | Time year/month | Obs/exp = ratio | Radius (km) | P-value |
|---|---|---|---|---|
| Primary | Jul/2019-Jul/2019 | 3,618/1,019.32=3.55 | 8.00 | <0.001 |
| Secondary | Jul/2019-Jul/2019 | 3,342/971.57=3.44 | 23.78 | <0.001 |
| 3rd | Aug/2020-Dec/2020 | 928/64.24=14.45 | 11.35 | <0.001 |
| 4th | Aug/2009-Aug/2019 | 1,607/279.61=5.75 | 2.65 | <0.001 |
| 5th | May/2019-May/2019 | 724/425.75=4.05 | 6.82 | <0.001 |
| 6th | Mar/2019-May/2019 | 461/805.22=3.06 | 9.04 | <0.001 |
| 7th | June/2019-June/2019 | 958/149.40=6.41 | 6.09 | <0.001 |
| 8th | April/2019-April/2019 | 355/13.66=25.99 | 0 | <0.001 |
| 9th | Feb/2019-Feb/2019 | 224/4.18=53.56 | 0 | <0.001 |
| 10th | Oct/2019-Oct/2019 | 326/16.26=20.04 | 2.96 | <0.001 |
| 11th | April/2019-May/2019 | 1,305/408.17=3.20 | 7.27 | <0.001 |
| 12th | Nov/2019-Jun/2020 | 404/36.69=11.01 | 6.80 | <0.001 |
| 13th | Sep/2019-Nov/2019 | 489/60.70=8.06 | 2.00 | <0.001 |
| 14th | Aug/2019-Aug/2019 | 638/130.50=4.89 | 4.47 | <0.001 |
| 15th | Nov/2019-Dec/2019 | 142/10.68=13.30 | 4.07 | <0.001 |
| 16th | Feb/2019-Feb/2019 | 88/4.03=21.82 | 3.48 | <0.001 |