Table 1 Comparisons of clinicopathological factors of breast cancers between A-bomb survivor and control.

Mean age of onset (years old)

58.0 (52.6, 63.4)^†

55.5 (49.7, 61.4)

0.51¹⁾

Mean tumor size (cm)

24.7 (20.7, 28.8)

36.2 (20.2, 52.3)

0.15¹⁾

Histological subtype

Papillo-tubular

9

4

0.29²⁾

Solid-tubular

1

2

Scirrhous

5

7

Histological grade

I

1

3

0.04³⁾

II

5

7

III

9

3

Lymph node metastasis

Positive

8

5

0.60⁴⁾

Negative

4

4

Unknown

3

4

ER status

Positive

7

8

0.26⁴⁾

Negative

8

5

PgR status

Positive

7

8

0.43⁴⁾

Negative

8

5

HER2 amplification (FISH)

Positive

7

2

0.04⁴⁾

Negative

5

11

No signal

3

0

C-MYC amplification (FISH)

Positive

9

2

0.09⁴⁾

Negative

5

7

No signal

1

4

Mean total length of CNA (bp)

64,032,415

(29,443,979, 139,238,660)

23,924,175

(6,936,445, 82,515,771)

0.15¹⁾

Mean number of CNA

12.2 (8.4, 16.0)

8.08 (3.0, 13.1)

0.16¹⁾