Table 2 ER and clinical and ultrasound features in Group I from the training set
Clinical and ultrasound features | Group I | Univariate analysis | ||
|---|---|---|---|---|
ER− (PR−, HER2−) (N = 194) | ER+ (PR−, HER2−) (N = 62) | X2 value | P value | |
Age (year) | Â | Â | 3.719 | 0.054 |
 ≤ 50 | 83 (42.8) | 18 (29.0) |  |  |
 > 50 | 111 (57.2) | 44 (71.0) |  |  |
Palpable ALN | Â | Â | 0.818 | 0.366 |
 No | 149 (76.8) | 51 (82.3) |  |  |
 Yes | 45 (23.2) | 11 (17.7) |  |  |
US ALN | Â | Â | 0.979 | 0.323 |
 No | 105 (54.1) | 38 (61.3) |  |  |
 Yes | 89 (45.9) | 24 (38.7) |  |  |
Breast cancer family history | Â | Â | 0.391 | 0.534 |
 No | 184 (94.8) | 60 (96.8) |  |  |
 Yes | 10 (5.2) | 2 (3.2) |  |  |
Menopause | Â | Â | 2.374 | 0.123 |
 No | 84 (43.3) | 20 (32.3) |  |  |
 Yes | 110 (56.7) | 42 (67.7) |  |  |
BMI (kg/m2) | Â | Â | 2.979 | 0.225 |
 < 18 | 3 (1.5) | 3 (4.8) |  |  |
 18–24 | 119 (61.4) | 33 (53.2) |  |  |
 > 24 | 72 (37.1) | 26 (42.0) |  |  |
Tumor size (mm) | Â | Â | 1.958 | 0.162 |
 ≤ 20 | 29 (14.9) | 14 (22.6) |  |  |
 > 20 | 165 (85.1) | 48 (77.4) |  |  |
Shape | Â | Â | 8.255 | 0.016* |
 Oval | 28 (14.4) | 1 (1.6) |  |  |
 Round | 7 (3.6) | 4 (6.5) |  |  |
 Irregular | 159 (82.0) | 57 (91.9) |  |  |
Orientation | Â | Â | 2.049 | 0.152 |
 Parallel | 126 (64.9) | 34 (54.8) |  |  |
 Not parallel | 68 (35.1) | 28 (45.2) |  |  |
Margin | Â | Â | 0.191 | 0.662 |
 Circumscribed | 5 (2.6) | 1 (1.6) |  |  |
 Not circumscribed | 189 (97.4) | 61 (98.4) |  |  |
Boundary | Â | Â | 3.434 | 0.064 |
 Abrupt | 140 (72.2) | 37 (59.7) |  |  |
 Halo | 54 (27.8) | 25 (40.3) |  |  |
Echo pattern | Â | Â | 2.338 | 0.505 |
 Hypoechoic | 175 (90.2) | 59 (95.2) |  |  |
 Isoechoic | 2 (1.0) | 1 (1.6) |  |  |
 Complex | 15 (7.8) | 2 (3.2) |  |  |
 Hyperechoic | 2 (1.0) | 0 (0.0) |  |  |
Posterior acoustic features | Â | Â | 6.378 | 0.095 |
 No | 47 (24.2) | 14 (22.6) |  |  |
 Enhancement | 106 (54.7) | 26 (41.9) |  |  |
 Shadowing | 34 (17.5) | 20 (32.3) |  |  |
 Combined | 7 (3.6) | 2 (3.2) |  |  |
Calcifications | Â | Â | 0.304 | 0.581 |
 No | 111 (57.2) | 33 (53.2) |  |  |
 Yes | 83 (42.8) | 29 (46.8) |  |  |
Vascular degree | Â | Â | 0.174 | 0.986 |
 0 | 27 (13.9) | 9 (14.5) |  |  |
 I | 25 (12.9) | 9 (14.5) |  |  |
 II | 86 (44.3) | 27 (43.6) |  |  |
 III | 56 (28.9) | 17 (27.4) |  |  |