Table 1.

Genotype frequencies of the deletion (del)/insertion (ins) polymorphism of 30 Kb on chromosome 7p11 amongst the four patient groups

	Del/Del	Ins/Del	Ins/Ins	P-value
AA case	0.06 (n = 12)	0.35 (n = 70)	0.59 (n = 117)
C case	0.62 (n = 362)	0.34 (n = 202)	0.04 (n = 25)	P < 0.0001a
AA controls	0.04 (n = 13)	0.31 (n = 112)	0.65 (n = 235)	P = 0.211b
C controls	0.64 (n = 232)	0.34 (n = 123)	0.02 (n = 9)	P = 0.336c

AA = African American, C = Caucasian.

^aP-value calculated between African American and Caucasians with invasive breast cancer.

^bP-value calculated between African American cases and controls.

^cP-value calculated between Caucasian cases and controls.