Table 2

Distribution of Chk1 staining category according to clinico-pathological parameters


Chk1 fraction positive nuclei (%)
Variable
0 to 5 (n = 108)
6 to 50 (n = 192)
51 to 100 (n = 41)
P value

Tumor type



0.001a
     Ductal
94
168
32

     Lobular
10
3
2

     Medullary
1
15
6

     Missing cases: 169




Tumor size (mm)



0.012b
     ≥20
48
64
10

     >20
60
127
31

     Missing cases: 160




Lymph node status



0.131b
     Negative
24
54
14

     Positive
83
138
27

     Missing cases: 160




NHG



<0.001c
     I
18
14
0

     II
67
66
3

     III
20
106
36

     Missing cases: 170




Ki67 positive (%)



<0.001c
     0 to 10
70
55
2

     11 to 25
19
61
5

     26 to 100
10
52
32

     Missing cases: 194





aKruskal-Wallis test (two-sided). bMann-Whitney test (two-sided). cSpearman's ρ. Chk1, checkpoint kinase 1; NHG, Nottingham Histological Grade.

Lundgren et al. Breast Cancer Research 2008 10:R81   doi:10.1186/bcr2150

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