Table 2. Space-time clusters of JE defined by using spatial scan statistic, mainland China*.
| Clusters | E_Minor | E_Major | E_Angle | E_Shape | Time frame | No. Counties | No. Obs | No. Exp | LLR | RR |
| 2002 | ||||||||||
| 1<$>\scale 60%\raster="rg1"<$> | 233 | 233 | n/a | 1.0 | 2002/7 | 119 | 1281 | 24.44 | 3928.80 | 63.17 |
| 2# | 202 | 202 | n/a | 1.0 | 2002/8 | 74 | 712 | 19.06 | 1918.26 | 41.21 |
| 3 | 166 | 249 | n/a | 1.5 | 2002/7 | 98 | 568 | 31.07 | 1133.57 | 19.71 |
| 2003–2005 | ||||||||||
| 1 | 240 | 240 | n/a | 1.0 | 2003/7 | 125 | 1787 | 42.02 | 5045.62 | 47.19 |
| 2 | 244 | 244 | n/a | 1.0 | 2005/7–2005/8 | 105 | 1053 | 44.81 | 2345.45 | 24.92 |
| 3 | 127 | 190 | −45° | 1.5 | 2005/7 | 66 | 399 | 19.01 | 838.73 | 21.45 |
| 4 | 230 | 460 | −30° | 2.0 | 2003/5–2003/6 | 84 | 380 | 44.43 | 511.59 | 9.02 |
| 5 | 131 | 393 | −40° | 3.0 | 2003/6–2003/7 | 119 | 383 | 49.00 | 456.73 | 7.97 |
| 2006 | ||||||||||
| 1 | 228 | 228 | n/a | 1.0 | 2006/8 | 133 | 1393 | 34.59 | 3905.00 | 47.97 |
| 2 | 243 | 243 | n/a | 1.0 | 2006/8 | 114 | 923 | 35.15 | 2176.81 | 29.34 |
| 3 | 126 | 252 | −30° | 2.0 | 2006/7 | 88 | 585 | 35.84 | 1102.73 | 17.46 |
| 2007–2010 | ||||||||||
| 1 | 220 | 330 | 90° | 1.5 | 2007/7–2007/8 | 144 | 1153 | 32.24 | 3045.52 | 38.59 |
| 2 | 126 | 252 | −30° | 2.0 | 2009/7–2009/8 | 98 | 735 | 32.46 | 1607.06 | 23.74 |
| 3 | 170 | 255 | 45° | 1.5 | 2008/7–2008/8 | 91 | 688 | 31.86 | 1471.96 | 22.56 |
| 4 | 197 | 295 | −45° | 1.5 | 2007/7–2007/8 | 146 | 340 | 32.42 | 494.64 | 10.70 |
| 5 | 0 | 0 | n/a | 1.0 | 2007/9 | 1 | 11 | 0.16 | 35.73 | 69.02 |
*
Significant clusters with P<0.01;
<$>\scale 60%\raster="rg1"<$>1: Primary cluster;
#
2–5: Secondary clusters; E_Minor: Semiminor axis of ellipse; E_Major: Semimajor axis of ellipse; E_Angle: the angle between the horizontal line and the semimajor axis of the ellipse; E_Shape: E_Major: E_Minor; No. Counties: number of counties within clusters; No. Obs: number of observed cases; No. Exp: number of expected cases; LLR: log likelihood ratio; RR: relative risk for the cluster compared with the rest of the country.