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Table 1 Potential determinants in relation to non-sentinel node status

From: Determinants for non-sentinel node metastases in primary invasive breast cancer: a population-based cohort study of 602 consecutive patients with sentinel node metastases

Determinants Category Total Negative Non-SN Positive Non-SN
N % N %
Screening No 309 197 50.4 112 53.1
Yes 278 190 48.6 88 41.7
Unknown 15 4 1.0 11 5.2
Age ≤50 151 103 26.3 48 22.7
51–74 370 239 61.1 131 62.1
≥75 81 49 12.5 32 15.2
Menopause Status Pre 153 104 26.6 49 23.2
Post < 5 ys 57 42 10.7 15 7.1
Post ≥5 ys 370 231 59.1 139 65.9
Unknown 22 14 3.6 8 3.8
Tumour size T1 331 220 56.3 111 52.6
T2 193 120 30.7 73 34.6
T3 & T4 10 6 1.5 4 1.9
Unknown 68 45 11.5 23 10.9
Tumour type Ductal 490 331 84.7 159 75.4
  D & L 14 5 1.3 9 4.3
Lobular 79 41 10.5 38 18.0
Other 19 14 3.6 5 2.4
Histological grade I 118 82 21.0 36 17.1
II 272 176 45.0 96 45.5
III 210 132 33.8 78 37.0
Unknown 2 1 0.3 1 0.5
Estrogen receptor Positive 545 358 91.6 187 88.6
Negative 56 33 8.4 23 10.9
Unknown 1 0 0.0 1 0.5
Progesterone receptor Positive 478 319 81.6 159 75.4
Negative 122 72 18.4 50 23.7
Unknown 2 0 0.0 2 0.9
HER2 status Negative 383 248 63.4 135 64.0
Positive 61 33 8.4 28 13.3
Unknown 158 110 28.1 48 22.7
Multifocality No 355 247 63.2 108 51.2
Yes 129 63 16.1 66 31.3
Unknown 118 81 20.7 37 17.5
Vascular invasion No 241 166 42.5 75 35.5
  Yes 91 60 15.3 31 14.7
Unknown 270 165 42.2 105 49.8