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Table 3 Spatio-temporal clustering of reported tuberculosis in the mainland of China from 2005 to 2015

From: Spatial and temporal clustering analysis of tuberculosis in the mainland of China at the prefecture level, 2005–2015

Cluster type

Cluster time frame

Coordinates/Radius

N

Observed cases

Expected cases

RR

LLR

P-value

Most likely cluster

1 September 2012–30 November 2015

(39.608093 N, 76.162029 E) / 523.07 km

5

73 552

22 572.11

3.27

36 033.32

<  0.001

Secondary cluster1

1 April 2009–30 June 2012

(22.898947 N, 113.887573 E) / 105.39 km

7

110 645

50 279.77

2.21

27 083.00

<  0.001

Secondary cluster2

1 April 2006–30 June 2009

(26.425756 N, 108.429245 E) / 382.47 km

24

351 481

238 013.99

1.49

24 198.12

<  0.001

Secondary cluster3

1 March 2005–31 May 2008

(28.754131 N, 117.356980 E) / 370.23 km

36

411 685

311 241.80

1.34

15 212.14

<  0.001

Secondary cluster4

1 March 2006–31 May 2009

(51.862772 N, 124.098025 E) / 1064.00 km

26

250 998

176 479.67

1.43

14 170.70

<  0.001

Secondary cluster5

1 June 2005–30 June 2005

(34.621634 N, 113.458645 E) / 201.59 km

15

13 933

4496.55

3.10

6325.44

<  0.001

Secondary cluster6

1 March 2006–31 May 2009

(33.910834 N, 93.584973 E) / 923.22 km

25

64 318

39 937.86

1.61

6297.61

<  0.001

Secondary cluster7

1 March 2005–31 May 2008

(31.993508 N, 107.064020 E) / 211.26 km

9

198 045

154 600.80

1.29

5695.32

<  0.001

Secondary cluster8

1 March 2005–31 May 2008

(41.492975 N, 110.349385 E) / 377.86 km

10

65 861

49 956.60

1.32

2311.51

<  0.001

Secondary cluster9

1 March 2005–31 May 2005

(34.554155 N, 119.103035 E) / 195.95 km

10

11 829

10 452.97

1.13

86.93

<  0.001

Secondary cluster10

1 March 2008–31 May 2008

(39.466843 N, 122.299835 E) / 223.74 km

7

4206

3534.86

1.19

60.05

<  0.001

Secondary cluster11

1 December 2005–31 December 2005

(37.483730 N, 117.822365 E) / 0 km

1

312

217.69

1.43

17.99

<  0.001

  1. Most likely cluster: P-value < 0.001; Secondary cluster: P-value < 0.001
  2. N number of prefectures in the cluster, RR Relative risk, LLR Log-likelihood ratios