Alcohol and breast cancer tumor subtypes in a Spanish Cohort

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Table 2 Associations between alcohol consumption and breast cancer by tumor subtype

Alcohol intake	Controls	Luminal A	Luminal B	TNBC	HER2 overexpressing
Alcohol intake	N	N OR^a(95 % CI)	N OR^a (95 % CI)	N OR^a (95 % CI)	N OR^a (95 % CI)
Abstainers	389	359 1.0	59 1.0	62 1.0	31 1.0
Light/Moderate drinkers (1–7 drinks/week)	293	291 1.03 (0.82, 1.28)	62 1.37 (0.92, 2.03)	50 1.05 (0.70, 1.58)	19 0.78 (0.43, 1.41)
Heavy drinkers^b(>7drinks/week)	65	141 2.16 (1.55, 3.02) P < 0.001	20 1.98 (1.11, 3.53) P = 0.019	19 1.93 (1.07, 3.47) P = 0.091	9 1.51 (0.68, 3.36) P = 0.730

^aPolytomous regression analysis. Adjusted for age at diagnosis, age at menarche, parity, breastfeeding, oral contraceptive use, menopausal status, BMI, smoking status, and family history
^bStudy subjects who consumed 1–7 drinks/week were considered light/moderate drinkers, and those who consumed >7drinks/week were considered heavy drinkers