Table 1.

Baseline characteristics of randomized participants

CharacteristicExercise group (n = 160)Control group (n = 160)
Age, mean (SD), y61.2 (5.4)60.6 (5.7)
Caucasian, n (%)144 (91)145 (91)
Full-time employment, n (%)82 (55)79 (51)
Education beyond high school, n (%)112 (70)102 (64)
Married or in common-law relationship113 (71)125 (78)
First degree relative with breast cancer, n (%)31 (19)35 (22)
Benign breast disease, n (%)36 (23)45 (28)
Past hormone replacement therapy use, n (%)75 (47)71 (44)
Age at menarche, n (%), y
    9-1128 (18)23 (15)
    1249 (31)43 (27)
    1340 (25)51 (32)
    14-1841 (26)41 (26)
Years since menopause, n (%)
    1.1-<535 (22)34 (21)
    5-<1050 (31)48 (30)
    10-<1541 (26)42 (26)
    15-32.933 (21)36 (23)
Age at first birth, n (%), y
    Nulliparous16 (10)13 (8)
    16-2481 (51)87 (54)
    25-4362 (39)60 (38)
Body composition measurements
    BMI, mean (SD), kg/m229.1 (4.5)29.2 (4.3)
    Waist, mean (SD), cm88.8 (10.6)88.8 (10.5)
    Percent body fat, mean (SD)42.2 (4.9)42.4 (5.7)
Maximal oxygen consumption, mean (SD), mL/kg/min27.1 (6.2)26.8 (6.0)
Recreational physical activity, mean (SD), h/wk2.9 (3.4)3.3 (3.5)