Table 2. Demographic and clinicopathological characteristics of patients with DCIS in the BCS and the MT group.
| Characteristic | Surgery type, n (%) | P value | ||
|---|---|---|---|---|
| BCS | MT | All | ||
| No. of patients | 29 (43.9) | 37 (56.1) | 66 (100.0) | |
| Age at diagnosis, years | 0.109 | |||
| <40 | 8 (27.6) | 4 (10.8) | 12 (18.2) | |
| 40–59 | 17 (58.6) | 22 (59.5) | 39 (59.1) | |
| ≥60 | 4 (13.8) | 11 (29.7) | 15 (22.7) | |
| Nodal surgery | 0.010 | |||
| SLNB | 10 (34.5) | 17 (45.9) | 27 (40.9) | |
| ALND | 11 (37.9) | 19 (51.4) | 30 (45.5) | |
| None | 8 (27.6) | 1 (2.7) | 9 (13.6) | |
| Radiotherapy | <0.001 | |||
| No | 7 (28.0) | 28 (96.6) | 35 (64.8) | |
| Yes | 8 (72.0) | 1 (3.4) | 19 (35.2) | |
| Endocrine therapy | 0.496 | |||
| No | 15 (68.2) | 23 (76.7) | 38 (73.1) | |
| Yes | 7 (31.8) | 7 (23.3) | 14 (26.9) | |
| Mean follow-up time, months (SD) | 123.9 (35.4) | 119.1 (29.3) | 121.2 (32.0) | |
| Death rate | 0 | 0 | 0 | |
| Local recurrence rate | 7 (25.0) | 0 (0) | 7 (10.8) | 0.002 |
| Loco-regional recurrence rate | 7 (25.0) | 1 (2.7) | 8 (12.3) | 0.017 |
| Distant metastasis rate | 0 | 0 | 0 | |
| Pathological classification of IBTR and regional recurrence | 1.000 | |||
| DCIS | 3 (42.9) | 0 (0) | 3 (37.5) | |
| IBC | 4 (57.1) | 1 (100.0) | 5 (62.5) | |
DCIS, ductal carcinoma in situ; BCS, breast-conserving surgery; MT, mastectomy; SLNB, sentinel lymph node biopsy; ALND, axillary lymph node dissection; IBTR, ipsilateral breast tumor recurrence; IBC, invasive breast cancer.