Table 1.
Association of ki67 index with Histological subtypes
| Histologic subtype | Ki67 index category N (%) | Total | P-value | |||
|---|---|---|---|---|---|---|
| < 15% | 15–24% | 25–44% | > 44% | |||
| Ductal | 373 (22) | 311 (18.3) | 406 (24) | 605 (36) | 1695 | < 0.01 |
| Lobular | 46 (50.5) | 20 (22) | 13 (14.3) | 12 (13.2) | 91 | |
| Cribriform | 4 (57.1) | 2 (28.6) | 1 (14.3) | 0 (0) | 7 | |
| Papillary | 19 (47.5) | 10 (25) | 6 (15) | 5 (12.5) | 40 | |
| Mucinous | 23 (63.9) | 6 (16.7) | 5 (13.9) | 2 (5.6) | 36 | |
| Micropapillary | 2 (13.3) | 4 (26.7) | 5 (33.3) | 4 (26.7) | 15 | |
| Tubular | 7 (70) | 0 (0) | 1 (10) | 2 (20) | 10 | |
| Medullary | 0 (0) | 0 (0) | 1 (11.1) | 8 (88.9) | 9 | |
| Metaplastic | 4 (9.3) | 11 (25.6) | 12 (28) | 16 (37.2) | 43 | |
| Mixed Ductal &Lobular | 1 (25) | 1 (25) | 0 (0) | 2 (50) | 4 | |
| Adenoid cystic carcinoma | 0 (0) | 1 (100) | 0 (0) | 0 (0) | 1 | |
| Total | 479 | 366 | 450 | 656 | 1951 | |
Fisher exact test was applied