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Table 2 Histological type by age and family history.

From: Histological type and grade of breast cancer tumors by parity, age at birth, and time since birth: a register-based study in Norway

  

Histological type (%)

 

No.

Duct

Lob

Muc

Tub

Med

Other

Unsp

Paget

Sarc

Age, diagn.

          

   20-29 yr

297

78.8

1.0(**)

1.0

0.0(*)

3.7**

1.0

11.1**

1.3

2.0**

   30-39 yr

3047

82.6

3.0(**)

0.9(**)

0.5(**)

1.9**

0.7(**)

8.7**

1.1

0.7**

   40-49 yr

7957

82.1

5.4(**)

1.5

1.0

1.1

0.9(**)

6.3**

1.2(*)

0.5

   50-59 yr

6868

82.9

7.4**

1.2(**)

1.3

1.0

1.1

3.2(**)

1.6

0.3

   60-69 yr

4132

78.0

8.7**

2.4**

1.4*

0.7(**)

2.0**

4.8(*)

1.9**

0.2(*)

   70-74 yr

566

74.2

9.5**

3.4**

1.9*

0.0(**)

2.7**

5.7

2.3*

0.4

P-valuea

<0.001

         

OR, unadj.b

 

-

1.4**

1.3**

1.3**

0.70**

1.5**

0.79

1.2**

0.65**

Family history c

          

   No

6505

81.8

7.0

1.4

1.4

1.3

1.3

4.2

1.2

0.5

   Yes

826

81.1

7.7

0.8

1.7

1.5

1.6

3.9

1.6

0.1

P-valuea

0.51

         

   < 50 yr

          

No

4621

83.5

5.6

1.3

1.1

1.5

1.0

4.2

1.1

0.6

Yes

607

80.6

6.3

1.0

2.3**

1.6

1.6

4.6

2.0*

0.0(*)

   P-valuea

0.034

         

   ≥ 50 yr

          

No

1884

77.8

10.4

1.5

1.9

0.7

1.9

4.3

1.4

0.3

Yes

219

82.6

11.9

0.5

0.0

0.9

1.4

1.8

0.5

0.5

   P-valuea

   0.18

         
  1. Histological types of breast cancer tumors by age at diagnosis and family history
  2. a Chi-square test for difference in proportions between groups, with significant cell-specific contributions to the chi-square statistic at 5% level marked with ** (Χ ≥ 1.96), and significant contributions at 10% level marked with * (Χ ≥ 1.64); in brackets if the observed number is lower than expected by chance
  3. b OR (each type vs. ductal tumors) for linear trend through ordered categories of exposure variable, significant trend (p < 0.05) marked with **
  4. c Mother/sister with a breast cancer diagnosis, restricted to 7331 cases with complete information
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BMC Cancer

ISSN: 1471-2407

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