Table 3 Association between alcohol consumption and breast cancer risk

From: Low-to-moderate alcohol intake and breast cancer risk in Chinese women

 

No. cases/controls

OR (95% CI) a

P- value

Alcohol consumption

 All women

   

Abstainers

660/529

1.00b

 

Ex-drinkers

15/10

1.34 (0.56–3.22)

0.51

Current drinkers

334/470

0.63 (0.52–0.76)

<0.001

 Premenopausal women

Abstainers

416/332

1.00b

 

Ex-drinkers

10/4

2.44 (0.71–8.39)

0.16

Current drinkers

246/335

0.66 (0.53–0.84)

0.001

 Postmenopausal women

   

Abstainers

244/197

1.00b

 

Ex-drinkers

5/6

0.68 (0.17–2.67)

0.58

Current drinkers

88/135

0.55 (0.38–0.78)

0.001

Type of alcohol consumed

 All women

   

Abstainers

660/529

1.00b

 

Beer only

82/103

0.65 (0.47–0.90)

0.01

Wine only

37/91

0.40 (0.26–0.60)

<0.001

Liquor only

30/30

0.81 (0.47–1.39)

0.44

 Premenopausal women

Abstainers

416/332

1.00b

 

Beer only

70/81

0.73 (0.51–1.06)

0.10

Wine only

19/60

0.30 (0.17–0.52)

<0.001

Liquor only

19/18

0.73 (0.37–1.47)

0.38

 Postmenopausal women

Abstainers

244/197

1.00b

 

Beer only

12/22

0.34 (0.15–0.75)

<0.01

Wine only

18/31

0.61 (0.32–1.16)

0.13

Liquor only

11/12

0.88 (0.36–2.16)

0.77

Ethanol intake (g per day)

   

 All women

None

660/529

1.00b

 

>0–<5

225/366

0.56 (0.45–0.69)

<0.001

5–<10

28/42

0.58 (0.35–0.98)

0.04

10–<20

12/13

0.89 (0.39–2.03)

0.78

20–<30

45/43

0.86 (0.54–1.37)

0.53

⩾30

39/16

2.33 (1.26–4.31)

<0.01

 Premenopausal women

None

416/332

1.00b

 

>0–<5

175/265

0.62 (0.48–0.79)

<0.001

5–<10

20/27

0.62 (0.33–1.17)

0.14

10–<20

8/9

0.85 (0.31–2.34)

0.75

20–<30

32/29

0.86 (0.49–1.50)

0.59

⩾30

21/9

2.28 (1.00–5.20)

0.05

 Postmenopausal women

None

244/197

1.00b

 

>0–<5

50/101

0.41 (0.27–0.62)

<0.001

5–<10

8/15

0.49 (0.19–1.24)

0.13

10–<20

4/4

0.97 (0.23–4.06)

0.96

20–<30

13/14

0.97 (0.42–2.26)

0.95

⩾30

18/7

2.29 (0.89–5.87)

0.09

  1. Abbreviations: CI=confidence interval; OR=odds ratio.
  2. aEstimates from unconditional logistic regression models included terms for age at interview (continuous), education (none, primary, secondary, tertiary), BMI (5-years ago), oral contraceptive use (never, ever), hormone replacement therapy (never, ever), breast cancer in first-degree relatives (no, yes), total energy intake (continuous), folate intake (continuous), tea drinking (no, yes) and menopausal status (no, yes; only for all women).
  3. bReference category.
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