Table 3 Clusters of emerging snail-infested sites outside embankments from 1949 to 2016
Clusters | Radius (km2) | Time frame | Duration of cluster (Years) | Observed number | Expected number | Observed/expected | P-value |
|---|---|---|---|---|---|---|---|
1 | 26.07 | 1953 | 1 | 98 | 16.29 | 6.01 | < 0.01 |
2 | 2.05 | 1974 | 1 | 28 | 0.84 | 33.15 | < 0.01 |
3 | 19.46 | 1956 | 1 | 119 | 34.88 | 3.41 | < 0.01 |
4 | 20.56 | 2003–2013 | 14 | 50 | 7.14 | 7.00 | < 0.01 |
5 | 8.48 | 2015 | 1 | 20 | 0.59 | 33.82 | < 0.01 |
6 | 7.52 | 1984 | 1 | 23 | 1.14 | 20.10 | < 0.01 |
7 | 4.16 | 1959 | 1 | 16 | 0.36 | 44.48 | < 0.01 |
8 | 10.56 | 1954–1955 | 2 | 19 | 1.12 | 17.01 | < 0.01 |
9 | 7.42 | 1950 | 1 | 12 | 0.32 | 37.53 | < 0.01 |
10 | 11.34 | 1962 | 1 | 15 | 0.79 | 19.05 | < 0.01 |
11 | 34.09 | 1956 | 1 | 44 | 12.79 | 3.44 | < 0.01 |
12 | 4.77 | 1996 | 1 | 6 | 0.054 | 110.10 | < 0.01 |