Table 3.

Genotype distribution in three types of familial breast cancer.

Genotype	Control	Familial breast cancer
		BRCA1+	BRCA2+	BRCAx
Total	635 (100)	226 (100)	98 (100)	100 (100)
3R/2R	4 (1)	0 (0)	0 (0)	0 (0)
3R/1R	9 (1)	2 (1)	0 (0)	0 (0)
3R/0R	2 (0)	0 (0)	0 (0)	0 (0)
2R/2R	100 (16)	61 (27)	27 (28)	23 (23)
2R/1R	255 (40)	113 (50)	51 (52)	48 (48)
2R/0R	34 (5)	4 (2)	1 (1)	3 (3)
1R/1R	190 (30)	45 (20)	17 (17)	19 (19)
1R/0R	38 (6)	1 (0)	2 (2)	7 (7)
0R/0R	3 (0)	0 (0)	0 (0)	0 (0)
P value		<0.0001	0.0042	0.2185