Table 3 Immunohistochemical ‘intrinsic’ subtypes of groups 1, 2, and 3
Parameter | No. of cases (%) | P | |||
|---|---|---|---|---|---|
Total | Group 1 | Group 2 | Group 3 | ||
Average age (±SD) | 54.5 (±11.3) | 51.9 (±6.0) | 55.0 (±13.4) | 56.1 (±10.9) |  |
Stage | |||||
 I | 9 | 3 (23) | 3 (13) | 3 (20) | NS |
 II | 35 | 8 (62) | 16 | (70) | 11 (73) |
 III | 7 | 2 (15) | 4 | (17) | 1 (7) |
Histological type | |||||
 Invasive ductal | 47 | 12 (92) | 23 (100) | 12 (80) | NS |
 Invasive lobular3 | 3 | 0 (0) | 0 (0) | 3 (20) |  |
 Squamous cell | 1 | 1 (8) | 0 (0) | 0 (0) |  |
Grade | |||||
 1 and 2 | 19 | 2 (15) | 7 (30) | 10 (67) | NS |
 3 | 32 | 11 (85) | 16 (70) | 5 (33) |  |
Immunohistochemical subtype | |||||
 Triple negative | 11 | 9 (69) | 0 (0) | 2 (13) | 0.000061 |
 Luminal A-like | 15 | 2 (15) | 4 (17) | 9 (60) |  |
 Luminal B-like | 18 | 2 (15) | 13 (57) | 3 (20) |  |
 HER2 overexpressing | 6 | 0 (0) | 6 (26) | 0 (0) |  |
 Not identified | 1 | 0 (0) | 0 (0) | 1 (7) |  |
Total | 51 | 13 (100) | 23 (100) | 15 (100) | Â |