NDLI: Physical activity, additional breast cancer events, and mortality among early-stage breast cancer survivors: findings from the WHEL Study

Content Provider	Springer Nature Link
Author	Bertram, Lisa A. Cadmus Stefanick, Marcia L. Saquib, Nazmus Natarajan, Loki Patterson, Ruth E. Bardwell, Wayne Flatt, Shirley W. Newman, Vicky A. Rock, Cheryl L. Thomson, Cynthia A. Pierce, John P.
Copyright Year	2010
Abstract	Research suggests that physical activity is associated with improved breast cancer survival, yet no studies have examined the association between post-diagnosis changes in physical activity and breast cancer outcomes. The aim of this study was to determine whether baseline activity and 1-year change in activity are associated with breast cancer events or mortality.A total of 2,361 post-treatment breast cancer survivors (Stage I–III) enrolled in a randomized controlled trial of dietary change completed physical activity measures at baseline and one year. Physical activity variables (total, moderate–vigorous, and adherence to guidelines) were calculated for each time point. Median follow-up was 7.1 years. Outcomes were invasive breast cancer events and all-cause mortality.Those who were most active at baseline had a 53% lower mortality risk compared to the least active women (HR = 0.47; 95% CI: 0.26, 0.84; p = .01). Adherence to activity guidelines was associated with a 35% lower mortality risk (HR = 0.65, 95% CI: 0.47, 0.91; p < .01). Neither baseline nor 1-year change in activity was associated with additional breast cancer events.Higher baseline (post-treatment) physical activity was associated with improved survival. However, change in activity over the following year was not associated with outcomes. These data suggest that long-term physical activity levels are important for breast cancer prognosis.
Starting Page	427
Ending Page	435
Page Count	9
File Format	PDF
ISSN	09575243
Journal	Cancer Causes & Control
Volume Number	22
Issue Number	3
e-ISSN	15737225
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-12-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Exercise Recurrence Survival Behavior Lifestyle Public Health/Gesundheitswesen Cancer Research Hematology Epidemiology Oncology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Cancer Research Oncology

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