Table 2

Significant spatio-temporal case-clusters in the 2002 Texas equine WNV epidemic in six contiguous Health Service Regions (See Figure 6 for cluster location).

Date (Until)

Cluster Rank

Observed cases

Expected cases

Log Likelihood Ratio

p value


Jul.31

1

19

1

59.52

0.001

2

3

0

7.74

0.016

Aug.31

1

134

15

201.29

0.001

2

54

5

80.45

0.001

3

25

5

21.82

0.001

Sep.30

1

255

29

380.49

0.001

2

95

10

133.35

0.001

3

29

9

13.88

0.001

Oct.31

1

280

68

203.69

0.001

2

113

24

89.85

0.001

3

69

21

35.20

0.001

4

96

53

14.98

0.001

5

96

56

12.00

0.001

Dec.2

1

280

70

196.25

0.001

2

113

25

86.98

0.001

3

70

22

34.89

0.001

4

104

54

18.75

0.001

5

104

58

15.31

0.001


Lian et al. International Journal of Health Geographics 2007 6:42   doi:10.1186/1476-072X-6-42

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