Year

Cluster Type

Counties (n)

Radius (km)

Observed

Cases

Expected

Cases

LLR

RR

P-Value

2013

Most likely

11

77.57

463

95.64

402.032655

6.04

<0.001

Secondary

1

0

205

38.63

183.265061

5.81

<0.001

2014

Most likely

4

20.21

322

89.47

194.280883

4.09

<0.001

Secondary

1

0

179

40.03

134.053329

4.80

<0.001

2nd Secondary

1

0

106

15.27

116.712271

7.27

<0.001

3rd Secondary

1

0

57

4.61

91.691239

12.70

<0.001

4th Secondary

4

41.93

61

18.24

31.342034

3.42

<0.001

2015

Most likely

4

20.21

152

21.19

172.394426

7.59

<0.001

Secondary

1

0

70

4.51

127.436735

15.98

<0.001

2nd Secondary

8

125.95

319

139.02

92.392152

2.49

<0.001

2016

Most likely

21

290.81

729

131.60

714.703469

6.92

<0.001

Secondary

1

0

164

25.83

168.091490

6.65

<0.001

2nd Secondary

1

0

36

5.97

34.804400

6.09

<0.001

2017

Most likely

18

221.58

1885

402.68

1671.737574

6.64

<0.001

2018

Most likely

1

0

5741

173.92

15697.973280

52.45

<0.001

Secondary

4

66.04

871

295.78

376.734034

3.06

<0.001

2nd Secondary

1

0

272

38.37

300.911872

7.20

<0.001

3rd Secondary

6

31.10

462

210.23

114.115699

2.24

<0.001

4th Secondary

1

0

67

24.42

25.098760

2.75

<0.001

2019

Most likely

19

194.50

19500

2700.66

24240.141295

9.87

<0.001

2020

Most likely

19

194.50

8124

866.07

12431.420751

14.67

<0.001