Table 2.

Associations between immunohistochemical markers

Correlations between basal markers
CK14CK5/6CK17OsteoEGFR
CK5/60.60*
CK170.51*0.61*
Osteo0.160.26*0.24*
EGFR0.42*0.47*0.52*0.26
Proportion of tumors positive for each marker by tumor characteristic (no. of observations in brackets)
ER positive6% (12)2% (4)1% (2)11% (30)5% (6)
ER negative22% (28)16% (18)28% (36)33% (42)47% (40)
Grade
    16% (3)0% (0)0% (0)9% (7)0% (0)
    27% (7)0% (0)2% (2)13% (15)11% (6)
    316% (30)12% (22)17% (36)24% (52)34% (40)
  • Abbreviations: CK, cytokeratin; Osteo, osteonectin.

  • * P < 0.0001.

  • P < 0.001.

  • P < 0.01.