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Table 3 Pure spatial clustering of P. falciparum cases in China during 2005–2014

From: Spatial and space–time distribution of Plasmodium vivax and Plasmodium falciparum malaria in China, 2005–2014

Year

Clusters

Latitude

Longitude

N

Observed cases

Expected cases

RR

p value

2005

Most likely

24.73918

98.31948

10

2545

27.18

335.72

0.001

Secondary

21.08838

110.32950

25

198

103.24

1.97

0.001

2006

Most likely

24.03683

97.80955

13

2265

28.68

348.14

0.001

2007

Secondary

24.73918

98.31948

9

1118

12.66

249.20

0.001

Most likely

29.52352

119.90339

1

20

1.55

13.08

0.001

2008

Secondary

24.85646

97.91907

7

590

5.02

255.22

0.001

Most likely

34.55674

118.78395

4

26

2.85

9.33

0.001

2009

Secondary

24.85646

97.91907

7

508

4.97

192.20

0.001

Most likely

37.52641

103.33228

8

22

0.92

24.47

0.001

2010

Secondary

24.85646

97.91907

7

529

6.35

133.89

0.001

Most likely

30.53620

106.41193

11

61

4.63

13.74

0.001

2011

Secondary

24.85646

97.91907

7

213

5.67

45.08

0.001

Most likely

32.10585

118.76075

38

297

54.25

6.88

0.001

2012

Secondary

23.52086

108.63520

1

112

0.75

167.01

0.001

Most likely

24.85646

97.91907

31

144

4.39

37.48

0.001

2013

Secondary

23.52086

108.63520

1

955

1.46

1081.9

0.001

Most likely

32.00298

117.56783

21

134

3.58

39.53

0.001

2014

Secondary

32.00298

117.56783

1

90

1.82

52.79

0.001

Most likely

23.52086

108.63520

32

56

0.75

77.63

0.001

  1. N number of counties per cluster, RR indicates relative risk for malaria case in the location