eTable 2.

Alcohol consumption and breast cancer risk by histology^*

	Ductal			Lobular
Alcohol (gms/day)	Cases	Incidence rate per 100,000 person-years	RR(95%CI)	Cases	Incidence rate per 100,000 person-years	RR (95% CI)
0	1283	216	1.0	150	25	1.0
0.1-4.9	2396	236	1.06 (0.99-1.13)	310	31	1.10 (0.90-1.33)
5-9.9	803	250	1.13 (1.04-1.24)	116	37	1.33 (1.04-1.71)
10-19.9	830	267	1.22 (1.12-1.33)	112	36	1.36 (1.15-2.24)
20-29.9	287	282	1.25 (1.10-1.42)	46	46	1.61 (1.15-2.24)
≥30	275	314	1.49 (1.30-1.70)	38	44	1.81 (1.26-2.60)
P for trend	5874	242	<0.0001	772	32	<0.0001

^*Only cases that were considered pure ductal or pure lobular were included in this analysis.