Table 3.

Breast Cancer-specific Mortality by OPRM1 A118G Genotype, Stratified by Ethnicity

	A118G genotype	n	Died	Censored	Mortality [95%CI]‡	p-value†
African Americans (n = 766)	A/A	728	176	552	0.26 [0.23, 0.29]	0.31
	A/G	34	5	29	0.15 [0.07, 0.33]
	G/G	2	0	2	0.00 [NE]
European Americans (n = 1273)	A/A	954	120	834	0.13 [0.11, 0.15]	0.070
	A/G	289	23	266	0.08 [0.05, 0.13]
	G/G	20	1	19	0.05 [0.01, 0.32]

^‡10-yr mortality estimated using Kaplan-Meier method; Log-Log transform was used to compute the confidence limits for the survivor function;

^† Log-rank test; CI = confidence interval; NE= nonestimable.