Table 1. BRCA1 expression and relationship with clinic pathological factors in nasopharyngeal carcinoma.

Characteristics	BRCA1 expression				ERCC1 expression
	N	Positive	Negative	P value1	N	Positive	Negative	P value1
SEX
Male	132	86	46	0.757	132	94	38	0.154
Female	69	43	26		69	42	27
Age(yr)
≤60	178	119	59	0.037	178	118	60	0.344
>60	23	10	13		23	18	5
WHO pathology classification
I (keratinizing)	4	1	3	0.069	4	4	0	<0.001
II (nonkeratinizig)	159	99	60		159	96	63
III(undifferentiated)	38	29	9		38	36	2
T stage
T1	10	8	2	0.275	10	5	5	0.547
T2	76	43	33		76	50	26
T3	71	47	24		71	49	22
T4	44	31	13		44	32	12
Lymph node metastasis
N0	24	15	9	0.952	24	18	6	0.190
N1	63	40	23		63	37	26
N2	77	50	27		77	57	20
N3	37	24	13		37	23	14
TNM stage AJCC group (6th ed.)
III	123	75	48	0.291	123	86	37	0.440
IV	78	54	24		78	50	28

¹Statistical analysis was estimated by χ2 test, and P < 0.05 was considered statistically significant; WHO, World Health Organization; AJCC, American Joint Committee on Cancer.