Breast Cancer Research and Treatment

, Volume 131, Issue 2, pp 637–643 | Cite as

Meeting the physical activity guidelines and survival after breast cancer: findings from the after breast cancer pooling project

  • Jeannette M. Beasley
  • Marilyn L. Kwan
  • Wendy Y. Chen
  • Erin K. Weltzien
  • Candyce H. Kroenke
  • Wei Lu
  • Sarah J. Nechuta
  • Lisa Cadmus-Bertram
  • Ruth E. Patterson
  • Barbara Sternfeld
  • Xiao-Ou Shu
  • John P. Pierce
  • Bette J. Caan
Epidemiology

Abstract

The 2008 Physical Activity (PA) Guidelines recommend engaging in at least 2.5 h (10 MET-hours/week) of moderate intensity PA per week (defined as 4 METs) to reduce risk of morbidity and mortality. This analysis was conducted to investigate whether this recommendation can be extended to breast cancer survivors. Data from four studies of breast cancer survivors measuring recreational PA from semi-quantitative questionnaires a median of 23 months post-diagnosis (interquartile range 18–32 months) were pooled in the After Breast Cancer Pooling Project (n = 13,302). Delayed entry Cox proportional hazards models were applied in data analysis with adjustment for age, post-diagnosis body mass index, race/ethnicity, menopausal status, TNM stage, cancer treatment, and smoking history. Engaging in at least 10 MET-hours/week of PA was associated with a 27% reduction in all-cause mortality (n = 1,468 events, Hazard Ratio (HR) = 0.73, 95% CI, 0.66–0.82) and a 25% reduction in breast cancer mortality (n = 971 events, HR = 0.75, 95% CI 0.65–0.85) compared with women who did not meet the PA Guidelines (<10 MET-hours/week). Risk of breast cancer recurrence (n = 1,421 events) was not associated with meeting the PA Guidelines (HR = 0.96, 95% CI, 0.86–1.06). These data suggest that adhering to the PA guidelines may be an important intervention target for reducing mortality among breast cancer survivors.

Keywords

Physical activity guidelines Breast cancer survival Mortality Epidemiology 

Notes

Acknowledgments

Joan Schwalbe contributed substantively to the data analysis. This study was supported by the National Cancer Institute (Grant number 3R01CA118229-03S1). The parent grants for each individual cohort included in the After Breast Cancer Pooling Project are: LACE (National Cancer Institute, R01 CA129059), NHS (P01 CA87969), SBCSS (Department of Defense, DAMD 17-02-1-0607 and National Cancer Institute, R01 CA118229), and WHEL (Susan G. Komen Foundation, #KG100988).

Conflict of interest

None.

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Copyright information

© Springer Science+Business Media, LLC. 2011

Authors and Affiliations

  • Jeannette M. Beasley
    • 1
  • Marilyn L. Kwan
    • 2
  • Wendy Y. Chen
    • 3
    • 4
  • Erin K. Weltzien
    • 2
  • Candyce H. Kroenke
    • 2
  • Wei Lu
    • 5
  • Sarah J. Nechuta
    • 6
  • Lisa Cadmus-Bertram
    • 7
  • Ruth E. Patterson
    • 7
  • Barbara Sternfeld
    • 2
  • Xiao-Ou Shu
    • 6
  • John P. Pierce
    • 7
  • Bette J. Caan
    • 2
  1. 1.Fred Hutchinson Cancer Research CenterSeattleUSA
  2. 2.Kaiser Permanente Division of ResearchOaklandUSA
  3. 3.Channing Laboratory, Department of MedicineBrigham and Women’s Hospital and Harvard Medical SchoolBostonUSA
  4. 4.Department of Medical OncologyDana Farber Cancer Institute, Harvard Medical SchoolBostonUSA
  5. 5.Shanghai Center for Disease Control and PreventionShanghaiChina
  6. 6.Vanderbilt UniversityNashvilleUSA
  7. 7.Cancer Prevention and Control Program, Moores UCSD Cancer CenterUniversity of CaliforniaSan Diego, San DiegoUSA

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