Table 1 Baseline characteristics according to randomisation to aspirin treatment in the Women’s Health Study (N = 37 270)
CharacteristicsAspirin(N = 18 652)Placebo(N = 18 618)p Value
Mean (SD) age (years)54.7 (7.1)54.7 (7.1)0.83
Mean (SD) BMI (kg/m2)26.0 (5.0)25.9 (5.0)0.39
BMI ⩾30 kg/m2 (%)17.717.60.71
History of hypertension (%)25.725.40.51
History of diabetes (%)2.72.40.15
Smoking status (%)
    Never51.251.20.61
    Past35.735.5
    Current (<15 cigs/day)4.85.0
    Current (15+ cigs/day)8.28.4
Exercise (%)
    Rarely38.338.10.51
    <1/week19.520.3
    1–3/week31.431.1
    ⩾4/week10.910.5
Alcohol consumption (%)
    Rarely44.845.10.79
    1–3/month13.412.8
    1–6/week31.631.8
    ⩾1/day10.210.3
Postmenopausal55.054.40.23
Postmenopausal hormone use
    Never50.050.40.27
    Past9.09.2
    Current41.040.4
  • BMI, body mass index.