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Table 4 Comparison between characteristics of B3 cases and those of benign or malignant cases

From: Breast lesions excised via vacuum-assisted system: could we get any clues for B3 lesions before excision biopsy?

  Benign B3 χ2 P B3 Malignant χ2 P
Age
  ≤ 50 1809 165 2.081 0.149 165 56 34.583 0.000
  > 50 177 10    10 28   
Pain
 No 1913 164 2.93 0.087 164 76 0.88 0.35
 Yes 73 11    11 8   
Duct changes
 No 1912 168 0.033 0.86 168 80 0.081 0.78
 Yes 74 7    7 4   
Lymph nodes
 No 1950 170 0.943 0.33 170 81 0.097 0.76
 Yes 36 5    5 3   
Palpable
 Yes 1727 151 0.06 0.8 151 70 0.40 0.53
 No 259 24    24 14   
Left/right
 Left 998 92 0.35 0.56 92 40 0.56 0.46
 Right 988 83    83 44   
Quadrant
 Areola 57 10 6.61 0.16 10 2 8.59 0.07
 Upper outer 939 74    74 40   
 Upper inner 549 45    45 30   
 Lower inner 189 21    21 3   
 Lower outer 252 25    25 9   
Echo pattern
 Anechoic 169 12 2.8 0.60 12 4 2.0 0.74
 Hyperechoic 113 8    8 4   
 Complex cystic/solid 141 13    13 3   
 Hypoechoic 1491 132    132 68   
 Heterogeneous 72 10    10 5   
Reproductive age
 Yes 1148 97 0.372 0.542 97 25 15.006 0.000
 No 838 78    78 59   
Menopause
 No 1767 169 9.955 0.002 169 58 39.706 0.000
 Yes 219 6    6 26   
Multifocality
 Unifocal 454 65 17.979 0.000 65 35 0.490 0.555
 Multifocal 1532 110    110 49   
Shape
 Regular 1786 150 3.064 0.080 150 48 25.733 0.000
 Irregular 200 25    25 36   
Margin
 Circumscribed 1611 145 0.319 0.572 145 29 60.137 0.000
 Not circumscribed 375 30    30 55   
Suspicious calcification
 Absent 1864 168 1.316 0.572 168 56 41.785 0.000
 Present 122 7    7 28   
Vascularity
 Absent/scarce 1847 142 30.870 0.000 142 53 9.937 0.002
 Present 139 33    33 31