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Table 1 Age-standardized rates (ASRs) of nasopharyngeal carcinoma (NPC) incidence in Sihui County, Guangdong Province, South China from 1987 to 2011

From: Incidence trend of nasopharyngeal carcinoma from 1987 to 2011 in Sihui County, Guangdong Province, South China: an age-period-cohort analysis

Year

Males

Females

Cases

Crude incidence (/100,000)

ASR (/100,000)

Cases

Crude incidence (/100,000)

ASR (/100,000)

1987

31

18.15

20.64

25

14.81

16.59

1988

47

27.20

30.47

17

10.00

10.63

1989

49

28.34

30.23

22

12.67

12.27

1990

51

28.49

30.34

26

14.87

14.81

1991

49

27.53

29.42

18

10.20

10.23

1992

48

26.35

26.66

40

22.53

21.90

1993

52

28.07

28.78

19

10.61

9.21

1994

64

33.95

33.56

31

17.19

17.32

1995

58

30.43

30.07

12

6.59

5.89

1996

62

32.04

34.75

28

15.25

14.69

1997

53

27.01

29.79

29

15.66

16.31

1998

56

27.88

32.72

21

11.14

11.34

1999

63

31.25

32.46

29

15.23

17.88

2000

52

25.68

26.07

28

14.65

14.22

2001

59

28.95

28.31

24

12.48

11.28

2002

62

30.33

29.71

23

11.89

11.44

2003

56

27.22

25.30

22

11.33

10.28

2004

58

27.94

27.87

23

11.85

10.50

2005

56

26.60

25.18

21

10.75

9.80

2006

77

36.35

35.77

36

18.22

15.99

2007

71

33.53

34.45

21

10.63

10.54

2008

76

36.03

37.28

38

19.00

18.33

2009

83

39.27

39.18

42

20.79

18.42

2010

83

39.17

30.91

32

15.74

11.79

2011

78

36.52

28.93

30

14.67

11.26

  1. The crude incidence is calculated by dividing the number of annual NPC cases by the total population. The ASRs of incidence were calculated by the direct method using the world standard population method of Segi (1960).
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Cancer Communications

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