Table 2 Spatial analysis scanning for clusters with high rates using the discrete Poisson model by Kulldorff’s spatial scan statistic
Year | No. of clusters | Most likely cluster | ||||||
|---|---|---|---|---|---|---|---|---|
No. of villages | Radius (km) | No. of cases | Expected no. of cases | RRa | LLRb | P-value | ||
2009 | 15 | 51 | 19.14 | 626 | 82.75 | 12.99 | 857.21 | <Â 0.001 |
2010 | 11 | 85 | 27.78 | 887 | 157.08 | 11.56 | 1036.11 | < 0.001 |
2011 | 8 | 91 | 28.72 | 598 | 122.57 | 9.97 | 622.09 | < 0.001 |
2012 | 8 | 150 | 33.63 | 111 | 45.74 | 3.25 | 42.19 | < 0.001 |
2013 | 3 | 79 | 23.65 | 185 | 32.81 | 9.91 | 206.70 | < 0.001 |
2014 | 3 | 25 | 12.06 | 31 | 2.24 | 20.06 | 57.70 | < 0.001 |