Short course hypofractionated whole breast irradiation after conservative surgery: a single institution phase II study

Table 1 Selected characteristics of the patients, tumors and treatments

Covariate	Stratification	N	%
Tumor Location	Superior Half	189	75.3
Tumor Location	Inferior Half	62	24.7
Pathology	DCIS	28	11.2
	Ductal	202	80.5
	Lobular	10	4.0
	Mixed	5	2.0
	Other	6	2.4
Grading	G1	34	13.5
	G2	136	54.2
	G3	67	26.7
	Gx	14	5.6
Estrogen Receptors	Negative	39	15.5
	Positive	210	83.7
	Unknown	2	0.8
Progesterone Receptors	Negative	59	23.5
	Positive	190	75.7
	Unknown	2	0.8
Menopausal Status	Premenopausal	70	27.9
Menopausal Status	Postmenopausal	181	72.1
Axilla staging	SNB(OSNA method [33, 34])	143	57.0
	AND	88	35.0
	None	20	8.0
pT Stage	DCIS	28	11.2
	pT1mic	4	1.6
	pT1a	15	6.0
	pT1b	37	14.7
	pT1c	109	43.4
	pT2	58	23.1
pN Stage	pN0	180	71.7
	pNmic	7	2.8
	pN1a	44	17.5
	pNx	20	8.0
Adjuvant tmt	None	20	8.0
	Hormones	132	52.6
	Chemotherapy	31	12.4
	Chemotherapy + Hormones	68	27.1

Abbreviations: SNB sentinal nodal biopsy, OSNA one step nucleic acid amplification, AND axillary nodal dissection, DCIS Ductal carcinoma in situ, pT Primary tumor stage at pathology, pN Nodal stage at pathology, tmt treatment

ISSN: 1756-9966