Table 1. Baseline demographics and clinical characteristics.
| Characteristics | One-stage, n=21 | Two-stage, n=23 |
|---|---|---|
| Age (years), mean (SD) | 48.3 (10.7) | 42.7 (9.9) |
| BMI (kg/m2), mean (SD)† | 23.1 (2.8) | 24.7 (3.8) |
| Comorbidity† | 7 | 3 |
| Smoking | ||
| Never smoker | 13 | 13 |
| Former smoker | 6 | 10 |
| Smoker | 2 | 0 |
| Laterality of procedure | ||
| Bilateral | 11 | 6 |
| Unilateral | 10 | 17 |
| Adjuvant therapy after surgery† | ||
| Endocrine treatment | 5 | 1 |
| None | 15 | 19 |
| Axillary surgery† | ||
| None | 13 | 13 |
| Sentinel node biopsy | 7 | 5 |
| Axillary dissection‡ | 0 | 2 |
| Indication for mastectomy† | ||
| Cancer | 3 | 0 |
| DCIS | 4 | 6 |
| Prophylactic | 13 | 14 |
†, missing values one-stage group n=1, two-stage group n=3; ‡, two patients in the two-stage group were diagnosed with DCIS but underwent axillary dissection due to micrometastasis in sentinel nodes. BMI, body mass index; DCIS, ductal carcinoma in situ.