Table 1 Characteristics of the patients a
Variables | Number of patients (%) |
|---|---|
All | 9,415 (100) |
Age at surgery, yr | |
<35 | 309 (3.3) |
35 to 50 | 3,809 (40.5) |
51 to 65 | 3,637 (38.6) |
>65 | 1,660 (17.6) |
Menopausal status | |
Premenopausal | 4,278 (45.4) |
Postmenopausal | 5,137 (54.6) |
Histological tumor subtype | |
Ductal | 7,114 (75.6) |
Lobular | 1,150 (12.2) |
Mixed | 397 (4.2) |
Other | 754 (8.0) |
pT | |
pT1 | 6,601 (70.1) |
pT2 | 2,514 (26.7) |
pT3/4 | 300 (3.2) |
pN | |
pNx | 309 (3.3) |
pN0 | 5,201 (55.2) |
pN+ | 3,905 (41.5) |
Tumor grade | |
G1 | 2,160 (22.9) |
G2 | 4,930 (52.4) |
G3 | 2,007 (21.3) |
NA | 318 (3.4) |
ER positivity | |
≥20% | 9,228 (98.0) |
<20% | 187 (2.0) |
PgR positivity | |
≥20% | 6,758 (71.8) |
<20% | 2,657 (28.2) |
Ki-67 level | |
<14% | 3,169 (33.7) |
14% to 19% | 2,276 (24.2) |
≥20% | 3,970 (42.2) |
PVI | |
Absent | 7,039 (74.8) |
Present | 2,376 (25.2) |
Surgery | |
Quadrantectomy | 7,777 (82.6) |
Mastectomy | 1,638 (17.4) |
Radiotherapy | |
No | 1,416 (15.0) |
Yes | 7,999 (85.0) |
Chemotherapy | |
No | 6,386 (67.8) |
Yes | 3,029 (32.2) |
Competing riskb | |
No events | 7,149 (75.9) |
Locoregional relapse | 592 (6.3) |
Distant metastasis | 852 (9.0) |
Other | 822 (8.7) |