Table 1.
Comparison of patient characteristics with BCCA cohort and University Hospital Leuven cohort (development set of IBTR! 2.0 nomogram)
| YCC (n = 2,206) | BCCA [6] (n = 7,811) | University Hospital Leuven cohort [11] (n = 1,898) | |
|---|---|---|---|
| Age (yr) | 49 (20–82) | 58 (17–88) | 57 (22–90) |
| Tumor size (cm) | |||
| ≤1 | 591 (26.80) | 2,096 (26.80) | 398 (20.97) |
| 1.1–2 | 1,086 (49.20) | 3,675 (47.00) | 835 (43.99) |
| >2 | 529 (24.00) | 2,040 (26.10) | 665 (35.04) |
| Nodal statusa) | |||
| Negative | 1,753 (79.80) | - | 1,342 (72.00) |
| Positive | 445 (20.20) | - | 521 (28.00) |
| Gradea) | |||
| 1 | 564 (27.90) | 1,359 (18.10) | 361 (19.03) |
| 2 | 936 (46.30) | 3,593 (47.90) | 835 (44.02) |
| 3 | 520 (25.70) | 2,544 (33.90) | 701 (36.95) |
| Resection margina) | |||
| Negative | 2,135 (96.90) | 6,730 (89.30) | 1,508 (79.70) |
| Close (≤ 2 mm) | 12 (0.50) | 15 (0.20) | 290 (15.30) |
| Positive | 56 (2.50) | 788 (10.50) | 94 (5.00) |
| Lymphovascular invasiona) | |||
| No | 2,082 (94.40) | 5,516 (73.10) | 1,002 (82.10) |
| Yes | 123 (5.60) | 2,025 (26.90) | 218 (17.90) |
| Chemotherapy | |||
| No | 790 (35.80) | 5,536 (70.90) | 1,337 (70.40) |
| Yes | 1,416 (64.20) | 2,275 (29.10) | 561 (29.60) |
| Hormonal therapy | |||
| No | 587 (26.60) | 4,731 (60.60) | 351 (18.50) |
| Yes | 1,619 (73.40) | 3,080 (39.40) | 1,547 (81.50) |
| Tumor laterality | |||
| Right | 1,074 (48.70) | - | - |
| Left | 1,132 (51.30) | - | - |
| Tumor locationa) | |||
| Outer and central | 1,447 (66.50) | - | - |
| Inner | 730 (33.50) | - | - |
Values are presented as median (range) or number (%).
YCC, Yonsei Cancer Center; BCCA, British Columbia Cancer Agency.
a)
Missing data were excluded.