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Table 2 The clusters of P. falciparum cases detected using the purely spatial clustering in 2011–2017, Myanmar

From: Spatio-temporal trends of malaria incidence from 2011 to 2017 and environmental predictors of malaria transmission in Myanmar

Year

Cluster type

Cluster areas (n)

Observed

Expected

RR

Radius (km)

LLR

P value

2011

A

19

82,306

16,321.67

6.07

193.69

73,093.61

0.000

 

B

37

96,774

30,464.18

3.86

301.82

51,754.42

0.000

2012

A

17

50,982

9558.10

6.42

134.74

47,658.75

0.000

 

B

51

74,841

26,736.30

3.55

458.53

34,438.70

0.000

2013

A

16

40,162

6330.15

7.98

128.30

44,093.98

0.000

 

B

31

40,085

11,314.10

4.32

274.45

24,683.83

0.000

2014

A

15

33,491

3736.28

12.73

126.67

48,613.24

0.000

 

B

31

27,116

6868.33

4.98

274.45

19,255.70

0.000

2015

A

1

6972

106.48

74.80

0

22,736.04

0.000

 

B

31

14,535

3633.68

5.07

274.45

10,492.98

0.000

 

B

1

4288

356.01

12.98

0

6883.72

0.000

 

B

2

1278

196.47

6.64

44.97

1322.27

0.000

2016

A

1

4135

50.73

96.54

0

14,448.37

0.000

 

B

21

6987

1411.46

6.38

184.96

6277.35

0.000

 

B

1

669

62.58

10.94

0

985.75

0.000

2017

A

1

13,016

42.98

407.00

0

63,212.89

0.000

 

B

3

6001

347.99

19.42

59.06

11,764.61

0.000

 

B

2

3497

180.67

20.71

44.97

7156.41

0.000

  1. Type, A: type of most likely cluster and B: second most likely cluster; n: the cluster number of township was identified by Kulldorff’s spatial scan; RR: relative risk; LLR: log likelihood ratio