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Table 2 Multivariable adjusted means of mammographic density measures by alcohol consumption by long-term, past-year, and current consumption in premenopausal women (n = 202)a

From: Alcohol consumption, endogenous estrogen and mammographic density among premenopausal women

Alcohol consumptionb Number Percent density (%) Absolute density (cm2)
Long-term, averagec    
 Never/rarely 7 32.14 (21.44, 42.84) 36.66 (20.17, 53.15)
 1–4 drinks/month 134 26.74 (24.30, 29.17) 31.02 (27.27, 34.77)
 >1 drinks/week 43 33.67 (29.27, 38.11) 42.08 (35.27, 48.89)
p-linear trend   0.051 0.029
 Past year, averaged    
 <1 drinks/week 66 28.71 (25.23, 32.20) 31.26 (25.89, 36.64)
 1–6 drinks/week 95 27.52 (24.73, 30.31) 32.17 (27.87, 36.48)
 ≥7 drinks/week 40 36.42 (32.02, 40.83) 46.17 (39.39, 52.95)
p-linear trend   0.003 0.001
 Current, past weeke    
 <1 drink/day 143 28.11 (25.79, 30.42) 33.08 (29.46, 36.69)
 ≥1 drink/day 58 33.57 (29.87, 37.28) 40.38 (32.78, 44.35)
p-difference   0.016 0.121
  1. Data presented as mean (95 % confidence interval). All analyses have used multivariate linear models
  2. FFQ food frequency questionnaire
  3. Adjusted for age (continuous), body mass index (continuous), number of children (continuous), previous oral contraceptives (categorical), and current smokers (categorical)
  4. aNumbers may vary owing to missing information
  5. bOne drink or unit is equal to 10 g alcohol
  6. cAlcohol consumption reported from age 15 to present time, FFQ
  7. dAlcohol consumption reported in past year, FFQ
  8. eAlcohol consumption reported in last 7 days representing 1 week, food diary