Table 1.

Baseline characteristics* of randomized participants

ExercisersControls
n8786
Age (y), mean ± SD60.7 ± 6.760.6 ± 6.8
BMI (kg/m2), mean ± SD30.4 ± 4.130.5 ± 3.7
Percentage body fat (dual energy X-ray absorptiometry), mean ± SD47.4 ± 4.847.3 ± 4.6
VO2 max (mL/kg/min), mean ± SD20.0 ± 3.520.4 ± 3.0
Alcohol (g/d), mean ± SD4.03 ± 8.44.62 ± 7.2
Total calories (kcal/d), mean ± SD1635 ± 792.21722 ± 671.8
Full-time employment, n (%)25 (29)25 (29)
Education, n (%)
    High school graduate10 (12)9 (10)
    Some college36 (41)35 (41)
    College graduate5 (6)10 (12)
    Graduate degree36 (41)32 (37)
Ethnicity, n (%)
    Non-Hispanic White74 (86)75 (87)
    African American4 (5)3 (4)
    Asian/Pacific Islander6 (7)3 (4)
    Hispanic/Latino0 (0)2 (2)
    American Indian0 (0)2 (2)
    Other2 (2)1 (1)
Family history of breast cancer, n (%)
    None59 (68)58 (67)
    First degree14 (16)16 (19)
    Second degree13 (15)11 (13)
Ever used hormone therapy, n (%)35 (48)38 (52)
History of hysterectomy, n (%)13 (14.9)18 (20.9)
  • * There were no statistically significant differences at baseline between intervention and control participants for these variables.