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Table 1 Baseline characteristics of the Swedish Women’s Lifestyle and Health study participants according to alcohol intake

From: Alcohol consumption, body mass index and breast cancer risk by hormone receptor status: Women’ Lifestyle and Health Study

  Alcohol intake (g/day)
  0 0.1–5 5.1–15 >15
No. of participans 10,153 22,249 11,734 1,097
Age at enrollment (mean) 39.8 39.7 40.5 41.4
Educational attainment >11 years, (%) 46.3 56.3 61.4 61.7
History of breast cancer in mother and/or sister (%) 4.2 4.2 5.3 5.9
Smoking habits (%)     
 Never 50.5 43.0 32.0 18.1
 Former 28.2 35.3 40.7 40.7
 Current 21.3 21.7 27.3 41.2
Age at menarche (mean) 12.9 13.0 13.0 13.1
Women with more than 3 children (%) 32.5 27.2 24.0 23.4
Age at first child birth among parous women (mean) 23.5 24.0 24.1 23.8
Total duration of breast feeding (months) 30.9 30.8 30.2 30.3
Ever oral contraceptive use (%) 75.1 85.0 88.2 89.7
Post-menopause (%) 4.4 3.8 4.3 3.7
Body mass index (>25 kg/m2, %) 31.9 24.1 21.1 24.6