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Table 1 Association of ki67 index with Histological subtypes

From: Ki67 index in intrinsic breast cancer subtypes and its association with prognostic parameters

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  
  1. Fisher exact test was applied