Table 3 PR and clinical and ultrasound features in Group II from the training set
Clinical and ultrasound features | Group II | Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|---|---|
PR− (ER+, HER2−) (N = 62) | PR+ (ER+, HER2−) (N = 636) | X2 Value | P value | OR (95%CI) | P value | |
Age (year) | Â | Â | 7.747 | 0.005* | Â | 0.007* |
 ≤ 50 | 18 (29.0) | 302 (47.5) |  |  | 2.204 (1.238–3.924) |  |
 > 50 | 44 (71.0) | 334 (52.5) |  |  | 1 |  |
Palpable ALN | Â | Â | 0.345 | 0.557 | Â | Â |
 No | 51 (82.3) | 541 (85.1) |  |  |  |  |
 Yes | 11 (17.7) | 95 (14.9) |  |  |  |  |
US ALN | Â | Â | 1.431 | 0.232 | Â | Â |
 No | 38 (61.3) | 437 (68.7) |  |  |  |  |
 Yes | 24 (38.7) | 199 (31.3) |  |  |  |  |
Breast cancer family history | Â | Â | 0.001 | 0.974 | Â | Â |
 No | 60 (96.8) | 615 (96.7) |  |  |  |  |
 Yes | 2 (3.2) | 21 (3.3) |  |  |  |  |
Menopause | Â | Â | 6.158 | 0.013* | Â | Â |
 No | 20 (32.3) | 310 (48.7) |  |  |  |  |
 Yes | 42 (67.7) | 326 (51.3) |  |  |  |  |
BMI (kg/m2) | Â | Â | 1.391 | 0.499 | Â | Â |
 < 18 | 3 (4.8) | 15 (2.4) |  |  |  |  |
 18–24 | 33 (53.2) | 351 (55.2) |  |  |  |  |
 > 24 | 26 (42.0) | 270 (42.4) |  |  |  |  |
Tumor size (mm) | Â | Â | 0.002 | 0.964 | Â | Â |
 ≤ 20 | 14 (22.6) | 142 (22.3) |  |  |  |  |
 > 20 | 48 (77.4) | 494 (77.7) |  |  |  |  |
Shape | Â | Â | 1.664 | 0.435 | Â | Â |
 Oval | 1 (1.6) | 29 (4.6) |  |  |  |  |
 Round | 4 (6.5) | 28 (4.4) |  |  |  |  |
 Irregular | 57 (91.9) | 579 (91.0) |  |  |  |  |
Orientation | Â | Â | 0.853 | 0.356 | Â | Â |
 Parallel | 34 (54.8) | 387 (60.8) |  |  |  |  |
 Not parallel | 28 (45.2) | 249 (39.2) |  |  |  |  |
Margin | Â | Â | 0.140 | 0.708 | Â | Â |
 Circumscribed | 1 (1.6) | 15 (2.4) |  |  |  |  |
 Not circumscribed | 61 (98.4) | 621 (97.6) |  |  |  |  |
Lesion boundary | Â | Â | 0.007 | 0.934 | Â | Â |
 Abrupt | 37 (59.7) | 383 (60.2) |  |  |  |  |
 Halo | 25 (40.3) | 253 (39.8) |  |  |  |  |
Echo pattern | Â | Â | 3.643 | 0.303 | Â | Â |
 Hypoechoic | 59 (95.2) | 554 (87.1) |  |  |  |  |
 Isoechoic | 1 (1.6) | 28 (4.4) |  |  |  |  |
 Complex | 2 (3.2) | 43 (6.8) |  |  |  |  |
 Hyperechoic | 0 (0.0) | 11 (1.7) |  |  |  |  |
Posterior acoustic features | Â | Â | Â | Â | Â | 0.039* |
 No features | 14 (22.6) | 213 (33.5) | 8.951 | 0.03* | 1 |  |
 Enhancement | 26 (41.9) | 158 (24.8) |  |  | 0.418 (0.211–0.830) | 0.013* |
 Shadowing | 20 (32.3) | 246 (38.7) |  |  | 0.876 (0.430–1.785) | 0.715 |
 Combined | 2 (3.2) | 19 (3.0) |  |  | 0.453 (0.115–2.632) | 0.453 |
Calcification | Â | Â | 0.032 | 0.859 | Â | Â |
 No | 33 (53.2) | 331 (52.0) |  |  |  |  |
 Yes | 29 (46.8) | 305 (48.0) |  |  |  |  |
Vascular degree | Â | Â | 0.960 | 0.811 | Â | Â |
 0 | 9 (14.5) | 99 (15.6) |  |  |  |  |
 I | 9 (14.5) | 110 (17.3) |  |  |  |  |
 II | 27 (43.6) | 285 (44.8) |  |  |  |  |
 III | 17 (27.4) | 142 (22.3) |  |  |  |  |