Table 4

Comparison of age strata with tumor histologic grade, immunohistochemistry and chromogenic in situ hybridization results

Parameter
Age <50
Age ≥ 50
Total

Immunohistochemistry



     Negative (0 and 1+)
33 (41.25%)
47 (58.75%)
80
     Positive (2+ and 3+)
41 (51.25%)
39 (48.75%)
80
     Total
74
86
160
Chromogenic in situ hybridization



     No amplification
43 (42.16%)
59 (57.84%)
102
     With amplification
31 (53.44%)
27 (46.55%)
58
     Total
74
86
160
Histologic grade



     1
0 (0.00%)
4 (100.00%)
4
     2
53 (47.32%)
59 (52.68%)
112
     3
21 (47.73%)
23 (52.23%)
44
     Total
74
86
160

Madrid and Lo Breast Cancer Res 2004 6:R593   doi:10.1186/bcr915