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Table 1 Pregnancy-associated cancer rates in the registry and hospital discharge datasets

From: Using hospital discharge data to identify incident pregnancy-associated cancers: a validation study

Clinical group of cancer

Incidence of pregnancy-associated cancer by data source

 
 

Cancer Registry a

All hospitalisations b

Index hospitalisation b

 

N

%

Rate

N

%

Rate

IRR c

N

%

Rate

IRR c

Melanoma

322

32.6

47.4

168

9.8

24.7

0.5*

142

18.4

20.9

0.4*

Breast

218

22.0

32.1

491

28.6

72.2

2.3*

152

19.7

22.4

0.7*

Thyroid and other endocrine

133

13.5

19.6

198

11.5

29.1

1.5*

119

15.5

17.5

0.9

Gynaecological

94

9.5

13.8

161

9.4

23.7

1.7*

81

10.5

11.9

0.9

Lymphohaematopoeitic

87

8.8

12.8

340

19.8

50.0

3.9*

110

14.3

16.2

1.3

Colorectal

35

3.5

5.1

44

2.6

6.5

1.3

22

2.9

3.2

0.6

Neurological

22

2.2

3.2

57

3.3

8.4

2.6*

24

3.1

3.5

1.1

Bone and other connective tissue

19

1.9

2.8

64

3.7

9.4

3.4*

25

3.2

3.7

1.3

Head and Neck

14

1.4

2.1

13

0.8

1.9

0.9

11

1.4

1.6

0.8

Upper Gastrointestinal

18

1.8

2.6

124

7.2

18.2

6.9*

52

6.8

7.7

3.0*

Respiratory

7

0.7

1.0

17

1.0

2.5

2.4

9

1.2

1.3

1.3

Ill-defined and unknown primary sites

11

1.1

1.6

22

1.3

3.2

2.0

12

1.6

1.8

1.1

Urogenital

8

0.8

1.2

19

1.1

2.8

2.4

11

1.4

1.6

1.3

Any

988

100

145.0

1,718

100

252.7

1.7*

770

100

113.3

0.8*

  1. Rates are expressed per 100,000 maternities.
  2. aTwo women had multiple cancer notifications of different type in a pregnancy.
  3. bTwenty-three women had multiple cancer hospitalisations of different type in a pregnancy.
  4. c Incidence rate ratio: The ratio of hospital cancer incidence to registry cancer incidence.
  5. (* denotes statistical significance at P < 0.05).