| 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 |  |  |