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Table 1 Patient characteristics (n = 470)

From: Accuracy of axillary ultrasound in preoperative nodal staging of breast cancer - size of metastases as limiting factor

  Patients pN+ % p
Age (years)     n.s.
≤50 74 28 37.8  
>50 396 138 34.8  
BMI     n.s.
<25 180 60 33.3  
25-29.9 165 59 35.8  
≥30 124 46 37.1  
Tumour stage     <0.001
pT1 278 62 22.3  
pT2 164 81 49.4  
pT3 & pT4 28 23 82.1  
Histological subtype     0.045
Ductal 340 128 37.6  
Lobular 44 16 36.4  
Others 86 22 25.6  
Grading     <0.001
G1 67 6 9  
G2 261 88 33.7  
G3 142 72 50.7  
Lymphangiosis     <0.001
No 278 33 11.9  
Yes 192 133 69.3  
Growth pattern     <0.001
Unifocal 427 139 32.6  
Multicentric 40 25 62.5  
ER status     n.s.
Positive 383 129 33.7  
Negative 87 37 42.5  
PR status     0.024
Positive 339 109 32.2  
Negative 131 57 43.5  
HER2 status     n.s.
Negative 432 150 34.7  
Positive 38 16 42.1  
Ki-67     <0.001
≤14% 161 38 23.6  
>14% 282 122 43.3  
Total 470 166 35.3