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Table 2 Multivariable adjusteda HR and 95% CI for mortality risk associated with alcohol consumption before breast cancer diagnosis

From: Pre-diagnosis alcohol consumption and mortality risk among black women and white women with invasive breast cancer

 

Person-years

Breast cancer-specific mortality

Mortality due to causes other than breast cancer

All-cause mortality

No.

Death

HR (95% CI)

No.

Death

HR (95% CI) 

No.

Death

HR (95% CI)

Alcohol drinking status prior to breast cancer diagnosis

 Non-drinkers

14,468

382

Referent

87

Referent

469

Referent

 Drinkers

22,684

442

0.87 (0.75–1.01)

144

1.17 (0.87–1.56)

586

0.93 (0.81–1.06)

Average alcohol consumption from age 15 years until breast cancer diagnosis (drinks/week)

 Non-drinkers

14,468

382

Referent

87

Referent

469

Referent

  < 1

6555

140

1.04 (0.85–1.27)

34

1.21 (0.80–1.84)

174

1.07 (0.90–1.28)

 1–< 3

7485

139

0.82 (0.67–1.01)

45

1.28 (0.87–1.87)

184

0.90 (0.76–1.08)

 3–< 7

5490

106

0.80 (0.64–1.01)

41

1.17 (0.79–1.74)

147

0.88 (0.72–1.07)

  ≥ 7

3153

57

0.75 (0.56–1.00)

24

0.95 (0.59–1.54)

81

0.79 (0.62–1.01)

 Ptrend

  

0.01

 

0.73

 

0.03

Average alcohol consumption in recent 5-year period beginning 7 years before breast cancer diagnosis and continuing until 2 years before breast cancer diagnosis (drinks/week)

 Non-drinkers

14,468

382

Referent

87

Referent

469

Referent

  < 1

4385

85

0.88 (0.69–1.12)

24

1.27 (0.80–2.04)

109

0.94 (0.76–1.17)

 1–< 3

4835

82

0.83 (0.65–1.07)

27

1.28 (0.82–2.02)

109

0.91 (0.74–1.13)

 3–< 7

4464

91

0.87 (0.68–1.10)

24

1.02 (0.63–1.63)

115

0.90 (0.73–1.11)

  ≥ 7

4614

78

0.74 (0.57–0.95)

27

0.89 (0.56–1.40)

105

0.77 (0.62–0.97)

 Ptrend

  

0.04

 

0.50

 

0.05

 Drank alcohol, but not in this period

4386

106

1.01 (0.81–1.26)

42

1.37 (0.92–2.02)

148

1.08 (0.89–1.31)

Average alcohol consumption in recent 2-year period beginning 2 years before breast cancer diagnosis until breast cancer diagnosis (drinks/week)

 Non-drinkers

14,468

382

Referent

87

Referent

469

Referent

  < 1

3863

67

0.76 (0.58–1.00)

19

1.21 (0.72–2.02)

86

0.84 (0.66–1.06)

 1–< 3

4560

79

0.82 (0.64–1.06)

30

1.53 (0.99–2.36)

109

0.94 (0.76–1.17)

 3–< 7

4000

79

0.86 (0.67–1.11)

19

0.90 (0.54–1.52)

98

0.87 (0.69–1.09)

  ≥ 7

4418

74

0.73 (0.56–0.95)

27

0.97 (0.61–1.54)

101

0.79 (0.63–0.99)

 Ptrend

  

0.08

 

0.60

 

0.12

 Drank alcohol, but not in this period

5842

143

1.06 (0.87–1.30)

49

1.21 (0.84–1.76)

192

1.09 (0.91–1.30)

  1. Abbreviations: HR hazard ratio, CI confidence interval
  2. aAll models are stratified by age at diagnosis, and include study site, race, education, household income, number of mammograms within the 5 years before breast cancer diagnosis, body mass index 5-years before diagnosis, number of comorbidities before diagnosis, smoking history, stage, estrogen receptor status, and histologic type of breast cancer tumor
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BMC Cancer

ISSN: 1471-2407

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