Table 5

Lifetimea physical activity and breast cancer risk, by race/ethnicity and menopausal status

Hours/weekPremenopausal womenHours/weekPostmenopausal women
Latinas 166 cases 228 controlsAfrican-Americans 124 cases 128 controlsWhites 113 cases 127 controlsLatinas 278 cases 421 controlsAfrican-Americans 270 cases 316 controlsWhites 299 cases 328 controls
ORb (95% CI)ORb (95% CI)ORb (95% CI)ORc (95% CI)ORc (95% CI)ORc (95% CI)
Total activityTotal activity
 <9.11.01.01.0 <9.61.01.01.0
 9.1–20.70.84 0.49–1.451.00 0.55–1.840.82 0.42–1.58 9.6–21.60.82 0.55–1.240.78 0.52–1.170.94 0.64–1.37
 ≥20.80.73 0.42–1.280.68 0.35–1.340.76 0.36–1.61 ≥21.70.81 0.54–1.220.71 0.47–1.070.91 0.60–1.41
Total moderate activitydTotal moderate activityd
 <6.81.01.01.0 <7.61.01.01.0
 6.9–16.61.01 0.58–1.761.32 0.69–2.501.06 0.54–2.07 7.6–17.70.74 0.49–1.130.85 0.57–1.271.03 0.70–1.52
 ≥16.70.82 0.47–1.460.77 0.38–1.560.44 0.20–0.99 ≥17.80.71 0.47–1.050.60 0.40–0.921.02 0.66–1.59
Recreational activityRecreational activity
 <1.51.01.01.0 <0.71.01.01.0
 1.5–3.90.77 0.43–1.381.20 0.61–2.390.81 0.41–1.60 0.7–2.61.28 0.86–1.890.99 0.65–1.511.07 0.72–1.60
 ≥4.00.76 0.41–1.421.37 0.73–2.550.79 0.39–1.60 ≥2.71.38 0.90–2.101.04 0.69–1.571.13 0.76–1.70
Total daily living activityeTotal daily living activitye
 <4.01.01.01.0 <4.31.01.01.0
 4.0–9.41.11 0.63–1.931.02 0.57–1.830.91 0.46–1.77 4.0–10.41.14 0.74–1.760.76 0.52–1.120.81 0.55–1.20
 ≥9.50.65 0.36–1.160.81 0.38–1.730.71 0.30–1.67 ≥10.51.00 0.66–1.500.91 0.58–1.441.10 0.71–1.71
Mostly moderate or strenuous jobsMostly moderate or strenuous jobs
 01.01.01.0 01.01.01.0
 0.1–9.91.07 0.62–1.840.88 0.43–1.810.93 0.46–1.85 0.1–9.00.88 0.59–1.321.01 0.66–1.520.65 0.44–0.96
 ≥10.00.87 0.49–1.550.67 0.35–1.280.87 0.40–1.91 ≥9.10.68 0.46–1.010.77 0.51–1.160.62 0.39–1.00
  • a From menarche to reference year.

  • b Adjusted for age, country of birth, education, family history of breast cancer, prior biopsy for benign breast disease, age at menarche, parity, age at first full-term pregnancy, breast-feeding, and BMI.

  • c Adjusted for age, country of birth, education, family history of breast cancer, age at menarche, parity, breast-feeding, and age at menopause.

  • d Adjusted for above variables and total vigorous activity.

  • e Includes walking, bicycling, and strenuous household and outdoor chores.