Table 1 Clinicopathological factors according to the status of SLN in cN0 breast cancer before and after propensity score matching
Factor | All patients (n = 582) | Matched patients (n = 178) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
cN0SN− (n = 471) | cN0SN+ (n = 111) | cN0SN− (n = 89) | cN0SN+ (n = 89) | ||||||||
N | % | N | % | p value | N | % | N | % | p value | ||
Age | ≥ 55 | 150 | 31.8 | 36 | 32.4 | 0.91 | 34 | 38.2 | 29 | 32.6 | 0.43 |
< 55 | 321 | 68.2 | 75 | 67.5 | 55 | 61.8 | 60 | 67.4 | |||
T factor | T1 | 354 | 75.2 | 57 | 51.4 | < 0.0001 | 51 | 57.3 | 51 | 57.3 | 1 |
T2 | 117 | 24.8 | 54 | 48.6 | 38 | 42.7 | 38 | 42.7 | |||
ER | Positive | 367 | 77.9 | 92 | 82.9 | 0.24 | 77 | 86.5 | 77 | 86.5 | 1 |
Negative | 104 | 22.1 | 19 | 17.1 | 12 | 13.5 | 12 | 13.5 | |||
PgR | Positive | 320 | 67.9 | 83 | 74.8 | 0.15 | 64 | 71.9 | 65 | 73 | 0.87 |
Negative | 151 | 22.1 | 28 | 25.2 | 25 | 28.1 | 24 | 27 | |||
HER2 | Negative | 390 | 82.8 | 93 | 83.8 | 0.8 | 79 | 88.8 | 79 | 88.8 | 1 |
Positive | 81 | 17.2 | 18 | 16.2 | 10 | 11.2 | 10 | 11.2 | |||
Nuclear grade | 1, 2 | 345 | 73.3 | 84 | 75.7 | 0.6 | 69 | 67.5 | 69 | 67.5 | 1 |
3 | 126 | 26.7 | 27 | 24.3 | 20 | 22.5 | 20 | 22.5 | |||
Ki67 | ≥ 14% | 170 | 36.1 | 31 | 27.9 | 0.11 | 22 | 24.7 | 22 | 24.7 | 1 |
< 14% | 293 | 63.9 | 77 | 72.1 | 67 | 75.3 | 67 | 75.3 | |||
Adjuvant chemotherapy | Yes | 153 | 32.5 | 66 | 59.5 | < 0.0001 | 49 | 55.1 | 49 | 55.1 | 1 |
No | 318 | 67.5 | 45 | 40.5 | 40 | 44.9 | 40 | 44.9 | |||
Adjuvant radiotherapy | Yes | 308 | 65.4 | 69 | 62.2 | 0.52 | 56 | 62.9 | 57 | 64 | 0.88 |
No | 163 | 34.6 | 42 | 37.8 | 33 | 37.1 | 32 | 36 | |||