Table 1

Average proportion of counties within clusters which had higher than expected human WNV rates.

Year

1%

2%

5%

7%

10%

20%

30%

2002

0.60

0.56

0.49

0.49

0.42

0.42

0.41

2003

0.66

0.64

0.60

0.62

0.62

0.60

0.65

2004

0.51

0.50

0.43

0.40

0.39

0.26

0.24

2005

0.51

0.48

0.46

0.45

0.36

0.40

0.36

2006

0.63

0.57

0.54

0.52

0.46

0.41

0.57

2007

0.53

0.55

0.49

0.48

0.47

0.45

0.42

2008

0.43

0.47

0.33

0.35

0.29

0.27

0.34

All years

0.72

0.72

0.64

0.63

0.64

0.60

0.60

Overall average

0.58

0.56

0.50

0.49

0.46

0.43

0.45

For all clusters in a given year/population threshold combination, the proportion of counties within that cluster which had a higher than expected human WNV incidence rate was calculated. These proportions were then averaged for each year/population threshold and compiled in this table.

Sugumaran et al. International Journal of Health Geographics 2009 8:43   doi:10.1186/1476-072X-8-43