Table 2.
Primary spatial-only P. falciparum clusters, their radius, the number of villages and cases contained in the clusters and the significance of the Kulldorff scan statistic in Gezira state from 1999 to 2009
| Year | Number of clusters | Number of Villages in cluster | Radius of cluster (Km) | % Examined inside cluster | % P. falciparum cases inside cluster | Relative Risk | P-Value | % P. falciparum positive inside cluster | % P. falciparum positive outside cluster |
|---|---|---|---|---|---|---|---|---|---|
| 1999 | 1 | 25 | 26.3 | 28.1 | 47.8 | 2.34 | 0.0001 | 14.7 | 6.3 |
| 2000 | 1 | 19 | 23.0 | 21.3 | 42.6 | 2.74 | 0.0001 | 8.0 | 2.9 |
| 2001 | 1 | 20 | 21.4 | 23.0 | 39.7 | 2.20 | 0.0004 | 3.6 | 1.6 |
| 2002 | 1 | 26 | 31.7 | 29.8 | 62.8 | 3.98 | 0.0001 | 7.9 | 2.0 |
| 2003 | 1 | 24 | 26.8 | 27.2 | 69.4 | 6.08 | 0.0001 | 7.3 | 1.2 |
| 2004 | 1 | 1 | 0.0 | 1.1 | 8.4 | 7.97 | 0.0001 | 15.0 | 1.9 |
| 2005 | 1 | 6 | 20.8 | 6.9 | 41.1 | 9.43 | 0.0001 | 69.7 | 7.4 |
| 2006 | 1 | 17 | 20.4 | 19.2 | 46.5 | 3.66 | 0.0001 | 86.9 | 23.7 |
| 2007 | 1 | 1 | 0.0 | 1.1 | 13.0 | 13.12 | 0.0001 | 14.9 | 1.1 |
| 2008 | 1 | 7 | 12.8 | 7.9 | 29.0 | 4.76 | 0.0001 | 40.8 | 8.6 |
| 2009 | 1 | 1 | 0.0 | 1.1 | 14.5 | 14.66 | 0.0001 | 16.9 | 1.2 |
| 1999-2009 | 1 | 24 | 26.8 | 27.3 | 49.2 | 2.59 | 0.0001 | 5.3 | 2.0 |