Whole brain radiotherapy for brain metastases from breast cancer: estimation of survival using two stratification systems

Table 2 Univariate analyses for survival (Log Rank test)

Variable	Number	Event (n)	%	P
AGE	132	106	OS 12 months	0.16
< 65 Years	42	36	34.8
>= 65 Years			29.3
KPS				<0.0001
< 70	89	75	21.7
>= 70	85	67	45.8
SURGICAL RESECTION				<0.0001
Yes	27	20	66.7
No	147	122	26.9
DOSE(Gy) FRACTIONATION (fr)				0.11
40 Gy/20 fr	66	55	27.6
30 Gy/10 fr	108	87
NUMBER LESIONS				0.003
Single	66	51	43.8
Multiple	108	91
CHEMOTHERAPY				0.29
Yes	32	27	47.8
No	142	122	28.4
RPA CLASS				< 0.0001
Class I	39	28	55.6
Class II	46	39	37.7
Class III	89	75	21.7
PRIMARY DISEASE CONTROL				0.002
Yes	86	62	46
No	88	80	22.8
EXTRA CRANIAL METASTASIS				30.001
Yes	80	50	23.
No	94	92	49
BS-BM				< 0.0001
Score 0	34	33	11.8
Score 1	54	52	24.1
Score 2	61	44	42.6
Score 3	25	13	69.2

ISSN: 1471-2407