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Table 4 Retrospective space-time analysis scanning for clusters with high rates using the discrete Poisson model

From: Village-based spatio-temporal cluster analysis of the schistosomiasis risk in the Poyang Lake Region, China

Clusters detected

No. of villages in clusters

Time frame

Population

No. of cases

Expected no. of cases

Annual/100,000

Obs/Exp

RRa

LLRb

P-value

Most likely cluster

141

2009–2011

94,430

2203

230.69

827.4

9.55

16.79

3502.96

< 0.001

Secondary likely cluster

1

4

2009–2011

4795

126

12.66

862.1

9.95

10.19

177.52

< 0.001

2

31

2009–2010

22,343

192

36.44

456.5

5.27

5.45

166.09

< 0.001

3

8

2009–2011

6904

121

17.33

604.9

6.98

7.14

132.61

< 0.001

4

50

2009–2011

4,6437

311

112.95

238.5

2.75

2.87

121.18

< 0.001

5

1

2009–2011

931

24

1.86

1119

12.92

12.98

39.32

< 0.001

6

13

2009–2010

22,859

86

31.83

234.1

2.73

2.7

31.62

< 0.001

  1. aRelative risk
  2. bLog likelihood ratio