Table 4.

Multivariable HR (95% CI) for breast cancer mortality according to total recreational physical activity category by selected characteristics in the CWLS

Total recreational physical activity after diagnosis (MET-h/wk)*
P for interaction
<8.0≥8.0
Age at diagnosis ≤59 y
    Breast cancer deaths/total women35/91726/1,288
    Multivariable HR (95% CI)1.00 (Reference)0.53 (0.31-0.89)
Age at diagnosis >59 y
    Breast cancer deaths/total women28/1,26020/1,017
    Multivariable HR (95% CI)1.00 (Reference)0.85 (0.47-1.54)0.21
Local stage at diagnosis
    Breast cancer deaths/total women24/1,61020/1,645
    Multivariable HR (95% CI)1.00 (Reference)0.81 (0.44-1.51)
Regional stage at diagnosis
    Breast cancer deaths/total women39/56726/660
    Multivariable HR (95% CI)1.00 (Reference)0.56 (0.34-0.94)0.27
BMI <25 kg/m2
    Breast cancer deaths/total women11/65715/1,051
    Multivariable HR (95% CI)1.00 (Reference)0.91 (0.39-2.13)
BMI ≥25 kg/m
    Breast cancer deaths/total women47/1,37228/1,157
    Multivariable HR (95% CI)1.00 (Reference)0.63 (0.39-1.02)0.59
  • * Median as the cut-off point.

  • Multivariable HR (95% CI) adjusted for age at diagnosis (not in stratified model), stage of disease at diagnosis (not in stratified model), state of residence at diagnosis, interval between diagnosis and physical activity assessment, postdiagnosis BMI (not in stratified model), postdiagnosis menopausal status, postdiagnosis hormone therapy use, total energy intake year before enrollment in the CWLS, education level at diagnosis, family history of breast cancer at diagnosis, and initial treatment modality (radiation, chemotherapy, tamoxifen).

  • Values do not add up to total because of missing information.