Surgical procedures
| Factor | ESPB (n=50) | PVB (n=50) |
| Lumpectomy with axillary lymph node biopsy, n (%) | 27 (54%) | 26 (52%) |
| Lumpectomy with axillary lymph node dissection, n (%) | 0 (0%) | 2 (4%) |
| Breast reconstruction, n (%) | 19 (38%) | 19 (38%) |
| Breast reduction, n (%) | 7 (14%) | 5 (10%) |
| Wide local excision, n (%) | 0 (0%) | 1 (2%) |
| Lumpectomy, n (%) | 1 (2%) | 0 (0%) |
ESPB, erector spinae plane block; PVB, paravertebral block.