Table 1 Observed survival (OS) and relative survival (RS) rates of female breast cancer in Qidong, 1972–2011 (%)

1

83.61

1.29

84.76

1.31

2

74.12

1.55

76.22

1.59

3

67.53

1.68

70.45

1.75

4

62.41

1.76

66.06

1.87

5

58.75

1.81

63.12

1.95

6

56.04

1.85

61.16

2.02

7

53.20

1.89

59.00

2.09

8

51.58

1.91

58.18

2.16

9

50.07

1.93

57.49

2.22

10

48.56

1.96

56.81

2.29

11

47.35

1.98

56.49

2.36

12

45.71

2.01

55.64

2.44

13

45.06

2.02

55.98

2.51

14

43.75

2.05

55.53

2.60

15

42.57

2.08

55.26

2.70

16

41.48

2.10

55.11

2.80

17

40.49

2.13

55.10

2.90

18

39.53

2.16

55.16

3.01

19

39.26

2.17

56.22

3.10

20

38.30

2.20

56.36

3.23

21

37.35

2.23

56.58

3.38

22

36.63

2.26

57.23

3.54

23

36.38

2.28

58.69

3.67

24

35.27

2.34

58.86

3.90

25

34.20

2.40

59.15

4.16

26

33.85

2.43

60.80

4.36

27

32.89

2.51

61.49

4.69

28

31.18

2.65

60.85

5.18

29

30.24

2.73

61.77

5.59

30

29.19

2.83

62.59

6.07

31

29.19

2.83

65.82

6.39

32

27.54

3.03

65.42

7.20

33

26.41

3.18

66.47

8.00

34

25.95

3.26

69.66

8.74

35

24.16

3.63

69.47

10.43

36

24.16

3.63

74.70

11.22

37

23.23

3.94

77.82

13.19

38

20.96

4.68

76.35

17.04

39

19.35

5.31

76.90

21.12

40

19.35

5.31

84.00

23.07