Table 1 Results of the spatial scan analysis of pancreatic cancer mortality at the county level in Shandong for the years 2011 to 2013.

From: Spatial distribution and clusters of pancreatic cancer mortality in Shandong Province, China

Cluster

County amount

Cases

Expected

Annual case/100000

RR

LLR

P value

Total without adjusted for age

Most likely cluster*

52

5769

3637

6.3

2.18

850.27

<0.01

Secondary cluster 1

1

128

56

9.1

2.28

33.47

<0.01

Secondary cluster 2

16

1480

1259

4.7

1.20

20.74

<0.01

Secondary cluster 3

1

161

111

5.8

1.46

10.08

<0.01

Total adjusted for age

Most likely cluster

78

2815

2146

2.0

1.90

211.69

<0.01

Secondary cluster 1

1

54

21

3.8

2.57

17.89

<0.01

Urban Without adjusted for age

Most likely cluster

23

1791

982

9.1

2.31

358.99

<0.01

Secondary cluster 1

1

61

25

12.3

2.49

18.97

<0.01

Secondary cluster 2

1

38

13

14.2

2.86

15.11

<0.01

Secondary cluster 3

1

80

44

9.1

1.84

12.10

<0.01

Urban adjusted for age

Most likely cluster

23

624

383

3.2

1.94

83.92

<0.01

Secondary cluster 1

2

79

42

3.6

1.91

13.10

<0.01

Rural without adjusted for age

Most likely cluster

65

4488

3150

5.0

2.32

549.81

<0.01

Rural adjusted for age

Most likely cluster

65

1547

1151

1.7

1.95

131.13

<0.01

  1. Note *: “Most likely cluster” was defined when the maximum log likelihood ratio (LLR) with statistical significance was detected by Monte Carlo simulation in spatial analysis; the other LLR values with statistical significance were identified as “Secondary cluster”. The relative risk (RR) was the ratio of the mortality inside a cluster area to the mortality outside a cluster area.
Back to article page