Table 1

Clinicopathological characteristics of estrogen-receptor-negative breast tumors according to basal cytokeratin (CK5/14) status

Clinicopathological parameter

CK5/14 negative (percentage)

CK5/14 positive (percentage)

p


All estrogen-receptor-negative tumors

60 (63)

35 (37)

Axillary lymph node status

Negative

23 (38)

19 (54)

0.14

Positive

37 (62)

16 (46)

HER-2 status

Non-amplified

35 (58)

30 (86)

0.01

Amplified

18 (30)

3 (9)

Data missing

7 (12)

2 (6)

p63

Negative

57 (95)

33 (94)

1.00

Positive

3 (5)

2 (6)

p53

Negative

26 (43)

13 (37)

0.65

Positive

26 (43)

17 (49)

Data missing

8 (13)

5 (14)

Histological type

Invasive ductal or mixed type

49 (82)

28 (80)

0.10

Invasive lobular

5 (8)

0 (0)

Medullary or atypical medullary

5 (8)

7 (20)

Other types

1 (2)

0 (0)


The p values were calculated, excluding the 'data missing' values, with Fisher's exact test except for the p value of histological type, which was calculated with the χ2 test.

Jumppanen et al. Breast Cancer Research 2007 9:R16   doi:10.1186/bcr1649

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