Table 2 Univariate analysis of the variations in ultrasonic characteristics between the limited nodal burden group and the high nodal burden group
US features | Total (n = 1274) | Limited nodal burden(%) (n = 1044) | High nodal burden (%) (n = 230) | P值 |
|---|---|---|---|---|
Distance to nipple | 2.60 ± 2.106 | 2.65 ± 2.117 | 2.35 ± 2.042 | 0.045 |
Distance to skin | 0.468 ± 0.262 | 0.478 ± 0.258 | 0.425 ± 0.277 | 0.005 |
 MD | 2.404 ± 1.033 | 2.319 ± 0.995 | 2.793 ± 1.112 | < 0.001 |
Orientation | Â | Â | Â | 0.483 |
 Parallel | 1159 | 947(90.7) | 212(92.2) |  |
 Nonparallel | 115 | 97(9.3) | 18(7.8) |  |
Margin | Â | Â | Â | 0.087 |
 Circumscribe | 105 | 95(9.1) | 10(4.3) |  |
 Indistinct | 951 | 770(73.8) | 181(78.7) |  |
 Angular | 26 | 22(2.1) | 4(1.7) |  |
 Microlobulated | 13 | 9(0.9) | 4(1.7 |  |
 Spiculated | 179 | 148(14.1) | 31(13.6) |  |
 Hyperechoic halo |  |  |  | < 0.001 |
 Negative | 942 | 804(77.0) | 138(60.0) |  |
 Positive | 332 | 240(23.0) | 92(40.0) |  |
 Posterior features |  |  |  | < 0.001 |
 No features | 1043 | 845(80.9) | 198(86.1) |  |
 Enhancement | 108 | 104(10.0) | 4(1.7) |  |
 Shadowing | 52 | 45(4.3) | 23(10.0) |  |
 Combined pattern | 71 | 50(4.8) | 5(2.2) |  |
Calcifications | Â | Â | Â | 0.261 |
 Absent | 524 | 437(41.9) | 87(37.8) |  |
 Present | 750 | 607(58.1) | 143(62.2) |  |
Shape | Â | Â | Â | 0.002 |
 Regular | 119 | 110(10.5) | 9(3.9) |  |
 Irregular | 1155 | 934(89.5) | 221(96.1) |  |
Axillary US | Â | Â | Â | 0.001 |
 Normal | 904 | 761(72.9) | 143(62.2) |  |
 Suspicious | 370 | 283(27.1) | 87(37.8) |  |