Table 4 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

38

27

11

8

7

1

4

3

1

21

14

7

(2000-2007)

Rate^b

51.9

71.8

30.9

10.9

18.6

2.8

5.5

8.0

2.8

28.7

37.2

19.7

Comparison:

E^a

39

28

11

7

4

4

0

0

0

23

13

10

The LEA

Rate^b

32.2

44.3

19.1

5.8

6.3

6.9

0

0

0

19.0

20.5

17.4

(2000-2007)

Rate ratio^c

1.61

1.62

1.62

1.89

2.95

0.41

-

-

-

1.51

1.81

1.13

95% CI^d

1.03-2.52

0.96-2.75

0.70-3.74

0.69-5.21

0.86-10.1

0.05-3.62

-

-

-

0.84-2.73

0.85-3.86

0.43-2.98

P^d

0.035

0.070

0.254

0.211

0.070

0.403

-

-

-

0.170

0.117

0.799

Comparison: Wengyuan County (2004-2005)

Rate^†

42.3

64.0

21.5

4.5

5.2

3.8

1.2

1.3

1.1

16.1

10.3

17.3

Rate ratio^c

1.23

1.12

1.44

2.43

3.58

0.74

4.58

6.15

2.55

1.78

3.61

1.14

95% CI^e

0.88-1.67

0.75-1.61

0.76-2.50

1.13-4.62

1.57-7.10

0.04-3.65

1.44-11.0

1.56-16.7

0.13-12.64

1.11-2.63

1.99-5.73

0.51-2.31

P^e

0.209

0.526

0.239

0.026

0.005

0.868

0.002

0.015

0.382

0.018

<0.001

0.650

Comparison: the RAGDP (2004-2005)

Rate^†

39.8

63.1

16.7

4.0

4.2

3.8

1.8

2.3

1.3

32.8

20.8

36.9

Rate ratio^c

1.30

1.14

1.85

2.73

4.41

0.74

3.06

3.48

2.15

0.88

1.79

0.53

95% CI^e

0.94-1.77

0.77-1.63

0.97-3.22

1.27-5.18

1.94-8.76

0.04-3.65

0.95-7.20

0.89-9.49

0.11-10.72

0.56-1.31

1.00-2.87

0.24-1.07

P^e

0.110

0.483

0.059

0.014

0.001

0.868

0.059

0.068

0.447

0.557

0.051

0.080