. Author manuscript; available in PMC: 2020 Sep 1.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2019 May 11;105(1):174–182. doi: 10.1016/j.ijrobp.2019.04.038

Table 4.

Outcome in patients treated with breast conservation by use of Regional Nodal Radiation

Pathologic status of axillary nodes	Regional Nodal RT			No Regional Nodal RT
	HR(p)	Events/ # Patients	5yr	HR(p)	Events/ # Patients	5yr
Axillary pCR (ypN0)
LRR	1.00 (ref)	3/62	91.5% (78.8–96.7)	1.66 (0.37–7.40) (0.51)	6/65	94.6% (84.1–98.2)
DS	1.00 (ref)	4/62	90.9% (77.4–96.5)	0.98 (0.26–3.65) (0.98)	4/65	93.3% (83.0–97.4)
OS	1.00 (ref)	5/62	95.5% (83.2–98.9)	0.88 (0.28–2.77) (0.83)	2/65	91.5% (80.8–96.4)
BCSS	1.00 (ref)	2/62	95.5% (83.2–98.9)	0.97 (0.26–3.61) (0.96)	4/65	93.2% (82.8–97.4)
No Axillary pCR (ypN+)
LRR	1.00 (ref)	8/91	90.4% (72.7 – 96.8)	1.55 (0.51–4.75) (0.44)	6/53	90.7% (82.2–95.3)
DS	1.00 (ref)	21/91	72.9% (52.5 – 85.6)	0.88 (0.39–1.93) (0.72)	11/53	74.5% (63.4–82.7)
OS	1.00 (ref)	18/91	82.2% (64.6–91.6)	0.65(0.26–1.60) (0.35)	10/53	79.8% (69.9–86.8)
BCSS	1.00 (ref)	17/91	84.6% (66.9–93.3)	0.63 (0.24–1.68) (0.35)	9/53	80.9% (71.0–87.7)

BCSS, breast cancer-specific survival; DS, disease-free survival; LRR, local-regional recurrence; OS, overall survival