Table 2.

Alcohol consumption at follow-up and breast cancer risk overall and by HT use in the CTS cohort.

Alcohol (g/d)	Person-years	Cases	RRa	95% CI	RRb	95% CI
All women
non-drinker	56,085	233	1.0		1.0c
<20	71,632	293	1.01	0.85–1.20	1.01	0.85–1.20
≥20	26,144	134	1.24	1.00–1.53	1.26	1.02–1.56
Never used HT
non-drinker	14,267	50	1.0		1.0
<20	15,858	40	0.77	0.50–1.16	0.78	0.51–1.18
≥20	5,160	25	1.47	0.91–2.38	1.52	0.94–2.47
Past HT use
non-drinker	28,379	117	1.02	0.73–1.42	1.05	0.75–1.47
<20	36,889	145	0.98	0.71–1.36	1.03	0.74–1.43
≥20	13,826	58	1.04	0.71–1.52	1.10	0.75–1.62
Stopped HT ≥5 yrsd
non-drinker	15,748	65	0.99	0.68–1.44	1.02	0.70–1.48
<20	17,859	82	1.11	0.78–1.59	1.16	0.81–1.66
≥20	6,814	30	1.05	0.66–1.66	1.11	0.70–1.76
Stopped HT 3–4 yrsd
non-drinker	6,888	31	1.15	0.73–1.81	1.20	0.76–1.89
<20	10,843	36	0.87	0.57–1.34	0.91	0.59–1.40
≥20	4,007	15	0.97	0.54–1.74	1.04	0.58–1.86
Stopped HT <3 yrsd
non-drinker	5,186	17	0.82	0.47–1.43	0.84	0.49–1.47
<20	7,435	26	0.87	0.54–1.41	0.93	0.57–1.49
≥20	2,748	11	1.00	0.52–1.92	1.06	0.55–2.04
Current HT use
non-drinker	11,588	58	1.28	0.87–1.88	1.34	0.91–1.97
<20	17,031	98	1.50	1.06–2.12	1.60	1.13–2.26
≥20	6,486	50	1.96	1.32–2.91	2.11	1.41–3.15

^aAge was the time-scale and analyses were stratified by age at follow-up.

^bAdjusted for age at first full-term pregnancy/nulliparity, family history of breast cancer in a first degree relative, body mass index, and long-term physical inactivity; age was the time-scale and analyses were stratified by age at follow-up.

^cAdditionally adjusted for HT use.

^dTime period is relative to completion of the 10-year follow-up questionnaire.