Table 2 Baseline characteristics of BCS and TM in the modeling group of T1 LABC patients.
Characteristics | BCS | TM | t/χ² | P value |
|---|---|---|---|---|
Age (M ± SD) | 59.85 ± 12.20 | 59.89 ± 13.31 | − 0.090 | 0.929 |
Race, n (%) | ||||
 White | 1045 (77.5) | 1047 (76.5) | 10.373 | 0.016 |
 Black | 196 (14.5) | 186 (13.6) |  |  |
 Other | 96 ( 7.1) | 132 ( 9.6) |  |  |
 Unknown | 11 ( 0.8) | 3 ( 0.2) |  |  |
Pathological type, n% | ||||
 Metaplastic carcinoma | 2 ( 0.1) | 2 ( 0.1) | 10.170 | 0.118 |
 Infiltrating duct carcinoma | 1065 (79.0) | 1015 (74.2) |  |  |
 Lobular carcinoma | 129 ( 9.6) | 148 (10.8) |  |  |
 Ductal carcinoma, micropapillary | 10 ( 0.7) | 11 ( 0.8) |  |  |
 Medullary carcinoma | 3 ( 0.2) | 3 ( 0.2) |  |  |
 Mucinous adenocarcinoma | 3 ( 0.2) | 3 ( 0.2) |  |  |
 Others | 136 (10.1) | 186 (13.6) |  |  |
Grade, n% | ||||
 III | 538 (39.9) | 539 (39.4) | 3.345 | 0.502 |
 I | 179 (13.3) | 164 (12.0) |  |  |
 II | 588 (43.6) | 606 (44.3) |  |  |
 IV | 5 ( 0.4) | 6 ( 0.4) |  |  |
 Unknown | 38 ( 2.8) | 53 ( 3.9) |  |  |
T, n% | ||||
 T1a | 34 ( 2.5) | 61 ( 4.5) | 9.654 | 0.047 |
 T1mic | 7 ( 0.5) | 11 ( 0.8) |  |  |
 T1b | 166 (12.3) | 181 (13.2) |  |  |
 T1c | 1134 (84.1) | 1110 (81.1) |  |  |
 T1NOS | 7 ( 0.5) | 5 ( 0.4) |  |  |
N, n% | ||||
 N2 | 1001 (74.3) | 935 (68.3) | 11.298 | 0.001 |
 N3 | 347 (25.7) | 433 (31.7) |  |  |
ER, n% | ||||
 Unknown | 26 ( 1.9) | 17 ( 1.2) | 3.892 | 0.143 |
 Positive | 1085 (80.5) | 1081 (79.0) |  |  |
 Negative | 237 (17.6) | 270 (19.7) |  |  |
PR, n% | ||||
 Unknown | 32 ( 2.4) | 21 ( 1.5) | 7.1785 | 0.028 |
 Positive | 921 (68.3) | 890 (65.1) |  |  |
 Negative | 395 (29.3) | 457 (33.4) |  |  |
HER2, n% | ||||
 Unknown | 64 ( 4.7) | 65 ( 4.8) | 7.811 | 0.020 |
 Positive | 222 (16.5) | 282 (20.6) |  |  |
 Negative | 1062 (78.8) | 1021 (74.6) |  |  |
Molecular subtype, n% | ||||
 HER2 enriched | 72 ( 5.3) | 94 ( 6.9) | 10.227 | 0.069 |
 Luminal A | 917 (68.0) | 863 (63.1) |  |  |
 Luminal B | 44 ( 3.3) | 63 ( 4.6) |  |  |
 Triple positive | 106 ( 7.9) | 125 ( 9.1) |  |  |
 Triple negative | 142 (10.5) | 158 (11.5) |  |  |
 Unknown | 67 ( 5.0) | 65 ( 4.8) |  |  |
Primary Site, n% | ||||
 Upper-inner quadrant | 127 ( 9.4) | 103 ( 7.5) | 128.590 | < 0.001 |
 Nipple/ Central portion | 40 ( 3.0) | 91 ( 6.7) |  |  |
 Lower-inner quadrant | 74 ( 5.5) | 65 ( 4.8) |  |  |
 Upper-outer quadrant | 549 (40.7) | 413 (30.2) |  |  |
 Lower-outer quadrant | 159 (11.8) | 125 ( 9.1) |  |  |
 Axillary Tail | 17 ( 1.3) | 12 ( 0.9) |  |  |
 Overlapping lesion | 270 (20.0) | 265 (19.4) |  |  |
 Breast | 112 ( 8.3) | 294 (21.5) |  |  |
Chemotherapy, n% | ||||
 No | 278 (20.6) | 270 (19.7) | 0.278 | 0.598 |
 Yes | 1070 (79.4) | 1098 (80.3) |  |  |
RT, n% | ||||
 No | 17 ( 1.3) | 27 ( 2.0) | 19.142 | < 0.001 |
 Yes | 900 (66.8) | 804 (58.8) |  |  |
Unknown | 431 (32.0) | 537 (39.3) | Â | Â |
