| Clinicopathological parameters | Values | p-Value | ER/PR expression | ER+, PR+ | ER+, PR− | ER−, PR+ | ER−, PR− |
| Age (years), Mean ± SD | 52.75 ± 10.60 | 56.00 ± 16.54 | 43.00 ± 0.00 | 51.70 ± 11.73 | 0.239 | Age group | ≤35 years, n (%) | 0 (0) | 2 (11.1) | 0 (0) | 14 (14.9) | 0.045 | 36–50 years, n (%) | 10 (41.7) | 4 (22.2) | 4 (100) | 34 (36.2) | >50 years, n (%) | 14 (58.3) | 12 (66.7) | 0 (0) | 46 (48.9) | Follow-up duration (months), Mean ± SD | 4.41 ± 2.06 | 4.44 ± 1.68 | 5.50 ± 1.73 | 3.95 ± 1.86 | 0.268 | Tumor laterality | Right breast, n (%) | 12 (50) | 8 (44.4) | 0 (0) | 58 (61.7) | 0.050 | Left breast, n (%) | 12 (50) | 10 (55.6) | 4 (100) | 36 (38.3) | Tumor size (cm), n = 92 | 3.00 ± 1.26 | 7.83 ± 3.35 | NA | 6.62 ± 3.43 | <0.001 | Tumor (T) stage, n = 92 | T1, n (%) | 4 (22.2) | 0 (0) | 0 (0) | 8 (11.8) | <0.001 | T2, n (%) | 14 (77.8) | 2 (33.3) | 0 (0) | 18 (26.5) | T3, n (%) | 0 (0) | 4 (66.7) | 0 (0) | 42 (61.8) | Tumor grade | Grade 2, n (%) | 8 (33.3) | 8 (44.4) | 4 (100) | 14 (14.9) | <0.001 | Grade 3, n (%) | 16 (66.7) | 10 (55.6) | 0 (0) | 80 (85.1) | Squamous differentiation | Present, n (%) | 14 (58.3) | 12 (66.7) | 4 (100) | 66 (70.2) | 0.426 | Absent, n (%) | 10 (41.7) | 6 (33.3) | 0 (0) | 28 (29.8) | Chondroid differentiation | Present, n (%) | 4 (16.7) | 0 (0) | 0 (0) | 4 (4.3) | 0.100 | Absent, n (%) | 20 (83.3) | 18 (100) | 4 (100) | 90 (95.7) | Spindle cell differentiation | Present, n (%) | 0 (0) | 4 (22.2) | 0 (0) | 12 (12.8) | 0.102 | Absent, n (%) | 24 (100) | 14 (77.8) | 4 (100) | 82 (87.2) | Nodal (N) stage, n = 92, n (%) | N0, n (%) | 14 (77.8) | 0 (0) | 0 (0) | 38 (55.9) | <0.001 | N1, n (%) | 4 (22.2) | 0 (0) | 0 (0) | 14 (20.6) | N2, n (%) | 0 (0) | 6 (100) | 0 (0) | 4 (5.9) | N3, n (%) | 0 (0) | 0 (0) | 0 (0) | 12 (17.6) | Recurrence, n (%) | Yes, n (%) | 4 (16.7) | 12 (66.7) | 4 (100) | 24 (25.5) | <0.0001 | No, n (%) | 20 (83.3) | 6 (33.3) | 0 (0) | 70 (74.5) | Survival status, n (%) | Alive, n (%) | 24 (100) | 10 (55.6) | 0 (0) | 66 (70.2) | <0.001 | Expired, n (%) | 0 (0) | 8 (44.4) | 4 (100) | 28 (29.8) |
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