Table 1

Baseline characteristics of study participants, the Alberta physical activity and breast cancer prevention trial, 2003–2007, n=320

Baseline characteristicExercisers (n=160)Controls (n=160)
Age (years)61.2±5.460.6±5.7
Body composition measurements
 BMI (kg/m2)29.1±4.529.2±4.3
 Intra-abdominal fat area (cm2)101.4±55.4103.2±56.0
 Total body fat (kg)30.9±8.231.3±8.6
 Per cent body fat42.2±4.942.4±5.7
Total energy intake (kcal/day)1551.2±598.71527.3±535.0
Past year total physical activity (MET -hours/week)
 Total physical activity114.2±57.6129.1±77.9
 Occupational activity50.4±49.152.2±57.9
 Household activity52.9±34.363.9±53.5
 Recreation activity10.2±11.812.1±13.6
Maximal oxygen consumption (mL/kg/min)27.1±6.226.8±6.0
Median (IQR)Median (IQR)
SOD12.6 (11.1–14.1)12.5 (11.3–13.8)
CAT21.0 (13.6–30.9)19.8 (13.0–29.0)
8-iso-PGF2α246 (206–293)258 (201–295)
8-OHdG7.3 (6.2–8.0)7.2 (6.4–7.9)
  • BMI, body mass index; 8-OHdg, 8-hydroxy-2′-deoxyguanosine; CAT, catalase; 8-iso-PGF2α, 8-isoprostaglandin F2α; MET, metabolic equivalent; SOD, superoxide dismutase.