Table 1 Clinicopathological characteristics of the study populations.
Characteristics | Before PSM | After PSM | ||||
|---|---|---|---|---|---|---|
No-chemotherapy | Yes-chemotherapy | p value | No-chemotherapy | Yes-chemotherapy | p value | |
No. patients | n = 174 | n = 507 | n = 174 | n = 174 | ||
Age at diagnosis (%) | < 0.001 | 0.845 | ||||
< 40 | 14 (8.0) | 92 (18.1) | 14 (8.0) | 14 (8.0) | ||
40–65 | 99 (56.9) | 344 (67.9) | 61 (35.1) | 56 (32.2) | ||
> 65 | 61 (35.1) | 71 (14.0) | 99 (56.9) | 104 (59.8) | ||
Race (%) | 0.408 | 0.602 | ||||
Black | 46 (26.4) | 128 (25.2) | 46 (26.4) | 54 (31.0) | ||
White | 109 (62.6) | 339 (66.9) | 109 (62.6) | 104 (59.8) | ||
Other | 19 (10.9) | 40 (7.9) | 19 (10.9) | 16 (9.2) | ||
Marital status (%) | 0.003 | 0.913 | ||||
Married | 73 (42.0) | 280 (55.2) | 73 (42.0) | 71 (40.8) | ||
Single | 101 (58.0) | 227 (44.8) | 101 (58.0) | 103 (59.2) | ||
Grade (%) | 0.264 | 0.838 | ||||
I–II | 14 (8.0) | 27 (5.3) | 14 (8.0) | 12 (6.9) | ||
III–IV | 160 (92.0) | 480 (94.7) | 160 (92.0) | 162 (93.1) | ||
T stage (%) | 0.014 | 0.949 | ||||
T1 | 90 (51.7) | 201 (39.6) | 90 (51.7) | 92 (52.9) | ||
T2 | 77 (44.3) | 269 (53.1) | 77 (44.3) | 76 (43.7) | ||
T3–T4 | 7 (4.0) | 37 (7.3) | 7 (4.0) | 6 (3.4) | ||
N stage (%) | 0.001 | 0.874 | ||||
N0 | 152 (87.4) | 380 (75.0) | 152 (87.4) | 150 (86.2) | ||
N1–N3 | 22 (12.6) | 127 (25.0) | 22 (12.6) | 24 (13.8) | ||
ER status (%) | 0.41 | 0.576 | ||||
Negative | 109 (62.6) | 337 (66.5) | 109 (62.6) | 115 (66.1) | ||
Positive | 65 (37.4) | 170 (33.5) | 65 (37.4) | 59 (33.9) | ||
PR status (%) | 0.491 | 0.409 | ||||
Negative | 138 (79.3) | 416 (82.1) | 138 (79.3) | 145 (83.3) | ||
Positive | 36 (20.7) | 91 (17.9) | 36 (20.7) | 29 (16.7) | ||
HER2 status (%) | 0.908 | 0.245 | ||||
Negative | 156 (89.7) | 451 (89.0) | 156 (89.7) | 163 (93.7) | ||
Positive | 18 (10.3) | 56 (11.0) | 18 (10.3) | 11 (6.3) | ||
Subtype (%) | 0.485 | 0.447 | ||||
TNBC | 90 (51.7) | 288 (56.8) | 90 (51.7) | 102 (58.6) | ||
HER2-enriched | 12 (6.9) | 32 (6.3) | 12 (6.9) | 7 (4.0) | ||
Luminal A | 66 (37.9) | 163 (32.1) | 66 (37.9) | 61 (35.1) | ||
Luminal B | 6 (3.4) | 24 (4.7) | 6 (3.4) | 4 (2.3) | ||
Surgery (%) | 0.568 | 1 | ||||
No/unknown | 5 (2.9) | 9 (1.8) | 5 (2.9) | 4 (2.3) | ||
Yes | 169 (97.1) | 498 (98.2) | 169 (97.1) | 170 (97.7) | ||
Radiation (%) | < 0.001 | 1 | ||||
No | 114 (65.5) | 224 (44.2) | 114 (65.5) | 115 (66.1) | ||
Yes | 60 (34.5) | 283 (55.8) | 60 (34.5) | 59 (33.9) | ||
