Table 1. Comparison of the general clinical data between the BCS + IORT group and the BCS group.
| Parameter | BCS (n=60) (%) | BCS + IORT (n=100) (%) | P value |
|---|---|---|---|
| Age (yr) | |||
| Median age | 49 | 54 | 0.005 |
| <35 | 8 (13.3) | 2 (2) | 0.011 |
| 35–49 | 23 (38.3) | 36 (36) | |
| ≥50 | 29 (48.4) | 62 (62) | |
| Tumor size (cm) | 0.221 | ||
| T1 | 27 (45) | 55 (55) | |
| T2 | 33 (55) | 45 (45) | |
| Tumor grade | 0.113 | ||
| 1 | 2 (3.3) | 8 (8.0) | |
| 2 | 19 (31.7) | 32 (32.0) | |
| 3 | 30 (50.0) | 34 (34.0) | |
| Unknown | 9 (15.0) | 26 (26.0) | |
| Lymph node status | 0.176 | ||
| Positive | 39 (65) | 75 (75) | |
| Negative | 21 (35) | 25 (25) | |
| ER | 0.133 | ||
| Negative | 14 (23) | 14 (14) | |
| Positive | 46 (77) | 86 (86) | |
| PR | 0.176 | ||
| Positive | 39 (65) | 75 (75) | |
| Negative | 21 (35) | 25 (25) | |
| HER-2 | 0.490 | ||
| Positive | 18 (30) | 25 (25) | |
| Negative | 42 (70) | 75 (75) | |
| TNM | 0.118 | ||
| 0 | 1 (2) | 2 (2) | |
| I | 11 (18) | 34 (34) | |
| IIA | 36 (60) | 53 (53) | |
| IIB | 12 (20) | 11 (11) |
BCS, breast-conserving surgery; IORT, intraoperative radiotherapy; ER, estrogen receptor; HER-2, human epidermal growth factor receptor 2; PR, progesterone receptor; TMN, tumor-node-metastasis.