Table 1 Main characteristics of the study population
Variable | Non-SLN negative (n = 154) | Non-SLN positive (n = 126) | P value |
|---|---|---|---|
Age (years) | 51.72 ± 11.04 | 50.83 ± 10.44 | 0.490 |
ER | 0.962 | ||
Negative | 26 (16.88%) | 21 (16.67%) | |
Positive | 128 (83.12%) | 105 (83.33%) | |
HER-2 | 0.013 | ||
Negative | 127 (82.5%) | 88 (69.8%) | |
Positive | 26 (16.9%) | 37 (29.4%) | |
Unknown | 1 (0.6%) | 1(0.8%) | |
Histology grading | 0.325 | ||
High | 16 (10.4%) | 9 (7.1%) | |
Low | 124 (80.5%) | 107 (84.9%) | |
Unknown | 14(9.1%) | 10(9.1%) | |
Ki-67 | 0.277 | ||
Low | 115 (74.7%) | 88 (69.8%) | |
High | 37 (24.0%) | 38 (30.2%) | |
Unknown | 2(1.3) | 0(%) | |
Number of positive SLN | < 0.001 | ||
≤ 2 | 137 (88.96%) | 81 (64.29%) | |
> 2 | 17 (11.04%) | 45 (35.71%) | |
PR | 0.861 | ||
Negative | 43 (27.92%) | 34 (26.98%) | |
Positive | 111 (72.08%) | 92 (73.02%) | |
Menopause | 0.874 | ||
No | 89 (57.79%) | 74 (58.73%) | |
Yes | 65 (42.21%) | 52 (41.27%) | |
Tumor size | 0.012 | ||
≤ 2 cm | 61 (39.61%) | 32 (25.40%) | |
> 2 cm | 93 (60.39%) | 94 (74.60%) | |
Lymphovascular invasion | < 0.001 | ||
No | 104 (67.53%) | 32 (25.40%) | |
Yes | 50 (32.47%) | 94 (74.60%) |