Table 2.

ORs and 95% CIs for breast cancer risk associated with exercise/sport activity, occupational activity, BMI, waist/hip ratio, height and energy intake

Case/controlOR (95% CI)
Adult exercise/sports (MET-h/d/y)
    >2.9211/181.0
    0 < h ≤2.92147/1881.33 (0.96-1.83)
    01,199/1,1811.86 (1.44-2.41)
    Ptrend<0.001
Occupational activity (hours of standing work per day, h/d/y)
Adult
    >4469/5811.0
    0 < h ≤4716/7421.17 (0.99-1.37)
    0256/2111.49 (1.19-1.86)
    Ptrend0.0006
BMI (kg/m2)
    <21333/4391.0
    21 <BMI <25679/7141.27 (1.06-1.52)
    >25443/4021.49 (1.21-1.83)
    Ptrend0.0002
Waist/hip ratio
    <0.76256/3471.0
    0.76 < waist/hip ratio <0.84806/8681.25 (1.03-1.51)
    >0.84394/3401.60 (1.28-2.00)
    Ptrend<0.0001
Energy intake (kcal/d)
    <1,540355/3971.0
    1,540 < kcal <2,107716/7900.99 (0.83-1.18)
    >2,107388/3691.15 (0.93-1.41)
    Ptrend0.1921
  • NOTE: Data were adjusted for age at interview, education, income, history of fibroadenoma, history of breast cancer among first-degree relatives, and ever had live birth. Occupational activity was measured as the average time spent in standing or walking and classified into one of three activity categories (i.e., heavy, medium, or nonphysical work).