Table 5. Recent and lifetime alcohol consumption stratified by menopausal status and hormone receptor status in AA women.

	Premenopausal (n=871)			Postmenopausal (n=821)			ER+/PR+			ER−/PR−
	Ca/Co	OR	95% CI	Ca/Co	OR	95% CI	Ca	OR	95% CI	Ca	OR	95% CI
Recent alcohol intake
Non-drinker	225/267	Ref		278/264	Ref		202	Ref		114	Ref
Drinker	183/195	1.21	0.90–1.62	117/162	0.78	0.57–1.07	121	0.93	0.70–1.23	61	0.89	0.62–1.27
<14 g per week	81/87	Ref		50/66	Ref		53	Ref		22	Ref
14–<28 g per week	32/41	0.81	0.45–1.48	28/29	1.14	0.55–2.36	26	1.01	0.57–1.81	13	1.25	0.57–2.77
⩾28 g per week	70/67	1.18	0.71–1.95	39/67	0.73	0.39–1.35	42	0.86	0.52–1.44	26	1.20	0.61–2.39
P for linear trend		0.38			0.23			0.53			0.69
Lifetime alcohol intake
Never	285/304	Ref		252/264	Ref		213	Ref		109	Ref
Ever	123/159	0.90	0.66–1.24	143/161	1.07	0.79–1.46	110	0.98	0.74–1.31	66	1.14	0.80–1.63
Non-drinker	285/304	Ref		252/264	Ref		213	Ref		109	Ref
⩽3510 drinks	77/92	1.00	0.69–1.46	73/66	1.33	0.89–2.00	68	1.23	0.87–1.74	35	1.21	0.78–1.89
>3510 drinks	44/65	0.74	0.47–1.17	63/91	0.82	0.55–1.22	39	0.70	0.47–1.06	29	1.02	0.63–1.63
Drinking at <20 years
No	370/391	Ref		358/369	Ref		293	Ref		159	Ref
Yes	38/72	0.60	0.38–0.94	37/55	0.74	0.46–1.20	30	0.64	0.41–0.99	16	0.61	0.34–1.07

Abbreviations: AA= African-American; BMI=body mass index; Ca=case; CI=confidence interval; Co=control; ER= oestrogen receptor; HRT= hormone replacement therapy; OC=oral contraceptive; OR=odds ratio; PR, progesterone receptor.

ORs are adjusted for age, ethnicity, country of origin, education, age at menarche, age at menopause (only for postmenopausal women), menopausal status (for analyses by hormone receptor status), parity, age at first birth, breastfeeding status, family history of breast cancer, HRT use, OC use, history of benign breast disease, total energy intake, BMI.