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Table 1 Characteristics of the study cohort

From: The relative risk of second primary cancers in Queensland, Australia: a retrospective cohort study

 

First Primary Cancers

Second Primary Cancers

 

Number of cases

%

Number of cases

%

Total

204,962

100.0

23,580

100.0

Sex

    

   Males

110,961

54.1

14,388

61.0

   Females

94,001

45.9

9,192

39.0

Age at first diagnosis

    

   15-49 years

41,690

20.3

3,150

13.4

   50-64 years

60,573

29.6

7,687

32.6

   65 years and over

102,699

50.1

12,743

54.0

Period of first diagnosis

    

   1982-1986

36,216

17.7

4,716

20.0

   1987-1991

43,904

21.4

5,841

24.8

   1992-1996

57,381

28.0

6,972

29.6

   1997-2001

67,461

32.9

6,051

25.7

Follow-up interval

    

   2 months to less than 1 year

n.a.

2,511

10.6

   1 year to less than 5 years

n.a.

8,924

37.8

   5 years to less than 10 years

n.a.

7,286

30.9

   10 years or longer

n.a.

4,859

20.6

Type of first primary cancer

    

   Head and neck (C00-C14,C30-C32)

10,942

5.3

1,989

8.4

   Oesophagus (C15)

2,075

1.0

105

0.4

   Stomach (C16)

4,103

2.0

206

0.9

   Colorectal (C18-C20,C218)

27,814

13.6

3,046

12.9

   Pancreas (C25)

2,817

1.4

49

0.2

   Lung (C33-C34)

17,347

8.5

729

3.1

   Melanoma (C44,M872-M879)

29,289

14.3

5,092

21.6

   Breast - female (C50)

26,725

13.0

2,962

12.6

   Cervix (C53)

3,492

1.7

300

1.3

   Uterus (C54)

3,527

1.7

409

1.7

   Ovary (C56)

2,864

1.4

164

0.7

   Prostate (C61)

23,122

11.3

3,006

12.7

   Kidney (C64-C66,C68)

4,927

2.4

655

2.8

   Bladder (C67)

8,719

4.3

1,680

7.1

   Brain & CNS (C70-C72)

2,566

1.3

50

0.2

   Thyroid (C73)

2,302

1.1

215

0.9

   Non-Hodgkin lymphoma (M967-M972)

6,618

3.2

689

2.9

   Lymphoid leukaemia (M982-M983)

2,645

1.3

422

1.8

   Myeloid leukaemia (M984-M993)

2,195

1.1

125

0.5

   Myeloma/PCT (M973)

2,174

1.1

134

0.6

   Other

18,699

9.1

1,553

6.6

  1. n.a. = not applicable; CNS = central nervous system; PCT = plasma cell tumours.