Determinants | Category | Center A | Center B | ||||
---|---|---|---|---|---|---|---|
SN positive | SN negative | OR 95% CI | SN positive | SN negative | OR 95% CI | ||
Screening | No | 297 | 179 | 1.00 | 422 | 164 | 1.00 |
Yes | 552 | 179 | 0.62(0.46–0.86) | 571 | 133 | 0.63(0.47–0.88) | |
Unknown | 39 | 16 | 0.82(0.42–1.60) | – | – | – | |
Age | ≤ 50 | 157 | 86 | 1.00 | 180 | 76 | 1.00 |
51–74 | 620 | 237 | 1.02(0.59–1.78) | 670 | 175 | 0.82(0.48–1.44) | |
≥ 75 | 111 | 51 | 0.69(0.34–1.39) | 143 | 46 | 0.69(0.34–1.37) | |
Menopause status | Pre | 167 | 90 | 1.00 | 181 | 74 | 1.00 |
Post < 5 years | 91 | 29 | 0.67(0.34–1.29) | 77 | 31 | 1.32(0.70–2.50) | |
Post ≥ 5 years | 589 | 238 | 0.88(0.50–1.52) | 710 | 184 | 0.77(0.43–1.34) | |
Unknown | 41 | 17 | 0.81(0.40–1.67) | 25 | 8 | 0.87(0.34–2.16) | |
Tumor size | T1 | 394 | 191 | 1.00 | 744 | 176 | 1.00 |
T2 | 136 | 105 | 1.63(1.16–2.30) | 210 | 108 | 2.13(1.54–2.94) | |
T3 and T4 | 4 | 7 | 6.28(1.50–26.40) | 9 | 5 | 1.48(0.44–4.90) | |
Unknown | 354 | 71 | 0.60(0.42–0.84) | 30 | 8 | 1.70(0.72–4.04) | |
Tumor type | Ductal | 620 | 306 | 1.00 | 704 | 236 | 1.00 |
D and L | 25 | 12 | 0.89(0.42–1.88) | 10 | 5 | 1.20(0.38–3.79) | |
Lobular | 80 | 45 | 0.90(0.58–1.40) | 136 | 43 | 0.84(0.54–1.30) | |
Others | 163 | 11 | 0.23(0.11–0.50) | 143 | 13 | 0.30(0.17–0.57) | |
Histological grade | I | 218 | 66 | 1.00 | 270 | 68 | 1.00 |
II | 363 | 169 | 1.31(0.91–1.89) | 444 | 136 | 0.80(0.56–1.16) | |
III | 290 | 136 | 1.49(0.98–2.26) | 273 | 91 | 0.80(0.51–1.24) | |
Unknown | 17 | 3 | 1.30(0.31–5.37) | 6 | 2 | 2.38(0.36–15.87) | |
Estrogen receptor | Positive | 679 | 335 | 1.00 | 859 | 271 | 1.00 |
Negative | 98 | 35 | 0.59(0.33–1.04) | 120 | 26 | 0.72(0.38–1.40) | |
Unknown | 111 | 4 | 0.07(0.00–1.04) | 14 | – | – | |
Progesterone receptor | Positive | 578 | 290 | 1.00 | 742 | 241 | 1.00 |
Negative | 199 | 79 | 0.71(0.48–1.08) | 237 | 56 | 0.79(0.50–1.23) | |
Unknown | 111 | 5 | 4.15(0.31–54.96) | 14 | – | – | |
HER-2 | Negative | 630 | 292 | 1.00 | 411 | 131 | 1.00 |
Positive | 77 | 44 | 1.04(0.66–1.64) | 97 | 22 | 0.63(0.37–1.10) | |
Unknown | 181 | 38 | 0.93(0.59–1.50) | 485 | 144 | 1.04(0.77–1.42) | |
Multifocality | No | 452 | 194 | 1.00 | 732 | 192 | 1.00 |
Yes | 93 | 71 | 1.58(1.07–2.32) | 115 | 73 | 2.21(1.50–3.23) | |
Unknown | 343 | 109 | 0.72(0.53–0.99) | 146 | 32 | 0.88(0.56–1.40) | |
Vascular invasion | No | 148 | 41 | 1.00 | 908 | 227 | 1.00 |
Yes | 18 | 34 | 6.10(2.98–12.50) | 69 | 63 | 3.04(2.03–4.57) | |
Unknown | 722 | 299 | 1.64(1.10–2.44) | 16 | 7 | 1.80(0.66–4.93) |