Comparison of IORT (Radical and Boost Dose) and EBRT in Terms of Disease-Free Survival and Overall Survival according to Demographic, Pathologic, and Biological Factors in Patients with Breast Cancer

Table 3

Factors associated with recurrence in patients that received boost dose by IORT ( value was considered concerning each variable that has the most risk).

		Electron boost		X-ray boost		value
		N	%	N	%
Stage	1	7/125	5.30	0/30	0.00	0.002
	2	18/412	4.20	9/159	5.40	—
	3	12/122	9.00	12/73	14.10
Size		14/360	3.70	6/109	5.20	0.021
	2.5 = 3 cm	6/93	6.10	1/38	2.60	0.96
		14/155	8.30	12/105	10.30
Grade	1	2/45	4.30	2/29	6.50	0.12
	2	14/365	3.70	4/93	4.10	0.008
	3	19/222	7.90	13/112	10.40
LVI	Positive	18/310	5.50	11/107	9.30	0.4
	Negative	18/311	5.50	3/42	6.70
KI67		8/168	4.50	0/23	0.00	0.37
		24/407	5.60	2/39	4.90
HER2	Positive	5/84	5.60	5/63	7.40	0.85
	Negative	29/518	5.30	15/184	7.50
ER	Positive	25/492	4.80	10/165	5.70
	Negative	10/148	6.30	10/57	14.90	0.04
PR	Positive	19/431	4.20	0/0	0.00
	Negative	9/159	5.40	0/0	0.00	0.19
Age		7/128	5.20	6/82	6.80	0.09
	=40–50	14/222	5.90	10/90	10.00	0.56
		12/263	4.40	5/90	5.30