Table 7

Multivariate-adjusteda mean value (95% CI) of percent breast density according to types of alcohol intake

Type of alcoholServings/weekbPtrendd
Nondrinkersc≤1≥2–4
Beer
Pre
Meana4448440.82
95% CI(37–50)(42–55)(37–51)
n 1866631
Post
Meana3230320.63
95% CI(29–34)(27–33)(29–36)
n 101213964
Red wine
Pre
Meana4443480.42
95% CI(39–49)(38–49)(35–62)
n 218569
Post
Meana3432280.02
95% CI(31–36)(29–34)(24–33)
n 104413836
White wine
Pre
Meana4544470.62
95% CI(38–52)(37–51)(39–55)
n 1966719
Post
Meana293134<0.01
95% CI(26–32)(28–33)(30–37)
n 93022663
Liquor
Pre
Meana4447450.60
95% CI(38–50)(40–54)(38–52)
n 1885342
Post
Meana3132310.77
95% CI(28–33)(29–35)(28–34)
n 929157133
  • a All analyses are adjusted for caloric intake, age, age2, body mass index, WHR, physical activity, age at menarche, age at first birth and number of births combined, smoking, family history of breast cancer, hormone replacement usage (postmenopausal women) and oral contraceptive usage (premenopausal women), and other sources of alcohol.

  • b Servings are glasses/week for beer, white and red wine, and shots/week for liquor.

  • c Nondrinkers of type of alcohol.

  • d Test for trend is an F test of the linear contrast.