| | Clinicopathological parameters | Values | p-Value | | HER2/neu expression | | Positive | Negative |
| | Age (years), Mean ± SD | 56.12 ± 12.11 | 51.01 ± 12.03 | 0.037 | | Age group | | ≤35 years, n (%) | 0 (0) | 16 (14.8) | 0.042 | | 36–50 years, n (%) | 12 (37.5) | 40 (37) | | >50 years, n (%) | 20 (62.5) | 52 (48.1) | | Follow-up duration (months), Mean ± SD | 4.31 ± 1.99 | 4.09 ± 1.85 | 0.564 | | Tumor laterality | | Right breast, n (%) | 6 (18.8) | 72 (66.7) | <0.001 | | Left breast, n (%) | 26 (81.3) | 36 (33.3) | | Tumor size (cm), n = 92 | 5.33 ± 3.44 | 6.09 ± 3.45 | 0.480 | | Tumor (T) stage, n = 92 | | T1, n (%) | 0 (0) | 12 (15) | 0.073 | | T2, n (%) | 8 (66.7) | 26 (32.5) | | T3, n (%) | 4 (33.3) | 42 (52.5) | | Tumor grade | | Grade 2, n (%) | 12 (37.5) | 22 (20.4) | 0.047 | | Grade 3, n (%) | 20 (62.5) | 86 (79.6) | | Squamous differentiation | | Present, n (%) | 32 (100) | 64 (59.3) | <0.001 | | Absent, n (%) | 0 (0) | 44 (40.7) | | Chondroid differentiation | | Present, n (%) | 0 (0) | 8 (7.4) | 0.198 | | Absent, n (%) | 32 (100) | 100 (92.6) | | Spindle cell differentiation | | Present, n (%) | 0 (0) | 16 (14.8) | 0.023 | | Absent, n (%) | 32 (100) | 92 (85.2) | | Nodal (N) stage, n = 92, n (%) | | N0, n (%) | 4 (33.3) | 48 (60) | 0.013 | | N1, n (%) | 4 (33.3) | 14 (17.5) | | N2, n (%) | 4 (33.3) | 6 (7.5) | | N3, n (%) | 0 (0) | 12 (15) | | Recurrence, n (%) | | Yes, n (%) | 20 (62.5) | 24 (22.2) | <0.001 | | No, n (%) | 12 (37.5) | 84 (77.8) | | Survival status, n (%) | | Alive, n (%) | 20 (62.5) | 80 (74.1) | 0.203 | | Expired, n (%) | 12 (37.5) | 28 (25.9) |
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