2.
Associations between clinicopathological characteristics and non-SLN metastasis
| Clinicopathological characteristics | Positive non-SLNs, n (%) | Negative non-SLNs, n | Total |
|
P |
| Gender | - | - | |||
| Male | 0 | 1 | 1 | ||
| Female | 95 (32.2) | 200 | 295 | ||
| Age (years) | 0.147 | 0.702 | |||
| <50 | 45 (31.3) | 100 | 145 | ||
| ≥50 | 50 (33.1) | 101 | 151 | ||
| Mammary gland | 0.190 | 0.663 | |||
| Left | 47 (33.3) | 94 | 141 | ||
| Right | 48 (31.0) | 107 | 155 | ||
| Location of primary mass | 2.739 | 0.602 | |||
| Outer upper | 42 (37.2) | 71 | 113 | ||
| Outer under | 9 (34.6) | 17 | 26 | ||
| Upper inner | 18 (26.5) | 50 | 68 | ||
| Lower inner | 5 (33.3) | 10 | 15 | ||
| Other | 24 (30.4) | 55 | 79 | ||
| Multicentric, multifocal | 3.842 | 0.050 | |||
| Yes | 12 (50) | 12 | 24 | ||
| No | 83 (30.5) | 189 | 272 | ||
| Clinical tumor size | 0.528 | 0.468 | |||
| T1 | 52 (30.4) | 119 | 171 | ||
| ≥T2 | 43 (34.4) | 82 | 125 | ||
| Surgery | 0.956 | 0.328 | |||
| Mastectomy | 81 (33.3) | 162 | 243 | ||
| Breast conversing surgery | 14 (26.4) | 39 | 53 | ||
| Tracer method | 1.113 | 0.573 | |||
| Blue dye alone | 23 (35.4) | 42 | 65 | ||
| Blue dye + radioisotope | 28 (28.0) | 72 | 100 | ||
| Blue dye + fluorescence | 44 (33.6) | 87 | 131 | ||
| Number of SLN detected | 1.917 | 0.166 | |||
| 1–2 | 42 (36.8) | 72 | 114 | ||
| ≥3 | 53 (29.1) | 129 | 182 | ||
| Metastatic SLN | 20.207 | <0.001 | |||
| 1 | 56 (28.1) | 143 | 199 | ||
| 2 | 18 (27.3) | 48 | 66 | ||
| ≥3 | 21 (67.7) | 10 | 31 | ||
| Continued | |||||