Table 3 Comparison of the cancer mortality rates (per 100,000) in high-exposure area (HEA) to those in low-exposure area (LEA), Wengyuan county and the rural areas of Guangdong Province (RAGDP)

The HEA

E^a

194

125

68

30

17

13

60

34

26

36

24

12

(2000-2007)

Rate^b

265.1

332.5

191.1

41.0

45.2

36.5

82.0

90.4

73.1

49.2

63.9

33.7

Comparison:

E^a

138

99

39

22

14

8

19

17

2

27

22

5

The LEA (2000-2007)

Rate^b

5 114.1

156.3

67.7

18.2

22.1

13.9

15.7

26.9

3.5

22.3

34.7

8.7

Rate ratio^c

2.32

2.13

2.83

2.25

2.05

2.63

5.28

3.37

21.06

2.20

1.84

3.89

95% CI^d

1.87-2.89

1.63-2.77

1.91-4.19

1.30-3.91

1.01-4.15

1.09-6.35

3.12-8.74

1.88-6.03

5.00-88.71

1.34-3.63

1.03-3.28

1.37-11.03

P^d

<0.001

<0.001

<0.001

0.003

0.043

0.025

<0.001

<0.001

<0.001

0.001

0.036

0.006

Comparison: Wengyuan County (2004-2005)

Rate^†

138.3

183.5

98.0

17.0

16.1

17.6

37.0

48.6

26.4

22.2

38.0

10.3

Rate ratio^c

1.92

1.81

1.95

2.41

2.81

2.08

2.22

1.86

2.77

2.22

1.68

3.27

95% CI^e

1.66-2.20

1.51-2.14

1.53-2.46

1.66-3.40

1.69-4.41

1.16-3.46

1.71-2.83

1.31-2.57

1.85-4.00

1.58-3.04

1.10-2.46

1.77-5.56

P^e

<0.001

<0.001

<0.001

<0.001

<0.001

0.017

<0.001

0.001

<0.001

<0.001

0.018

0.001

Comparison: the RAGDP (2004-2005)

Rate^†

131.8

167.3

90.3

11.8

16.7

7.1

15.0

20.4

9.9

26.6

39.8

14.6

Rate ratio^c

2.01

1.99

2.12

3.48

2.71

5.14

5.46

4.43

7.73

1.85

1.61

2.31

95% CI^e

1.74-2.30

1.65-2.35

1.66-2.67

2.39-4.90

1.63-4.25

2.86-8.57

4.21-6.99

3.12-6.12

4.91-10.64

1.32-2.53

1.05-2.35

1.25-3.92

P^e

<0.001

<0.001

<0.001

<0.001

<0.001

<0.001

<0.001

<0.001

<0.001

0.001

0.030

0.010