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J Cancer Surviv. 2013 Jun;7(2):247-52. doi: 10.1007/s11764-013-0265-y. Epub 2013 Feb 2.

The association between television watching time and all-cause mortality after breast cancer.

Author information

  • 1Applied Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD 20892, USA. stephanie.george@nih.gov

Abstract

PURPOSE:

Sedentary time is a rapidly emerging independent risk factor for mortality in the general population, but its prognostic effect among cancer survivors is unknown. In a multiethnic, prospective cohort of breast cancer survivors, we hypothesized that television watching time would be independently associated with an increased risk of death from any cause.

METHODS:

The Health, Eating, Activity, and Lifestyle Study cohort included 687 women diagnosed with local or regional breast cancer. On average 30 (±4) months postdiagnosis, women completed self-report assessments on time spent sitting watching television/videos in a typical day in the previous year. Multivariate Cox proportional hazards models were used to estimate hazard ratios (HR) and 95 % confidence intervals (CI) for death from any cause (n = 89) during the 7 years of follow-up.

RESULTS:

Television time (top tertile vs. bottom tertile) was positively related to risk of death (HR, 1.94; 95 % CI, 1.02, 3.66, p trend = 0.024), but the association was attenuated and not statistically significant after adjustment for aerobic moderate-vigorous intensity physical activity (HR, 1.70; 95 % CI, 0.89, 3.22, p trend = 0.14) and all covariates (HR, 1.39; 95 % CI, 0.69, 2.82, p trend = 0.48).

CONCLUSION:

In this first published investigation on this topic, we did not observe a statistically significant multivariate-adjusted association between television watching time and risk of death among women diagnosed with breast cancer.

IMPLICATIONS FOR CANCER SURVIVORS:

These results begin an evidence base on this topic that can be built upon to inform lifestyle recommendations for this expanding, aging population.

PMID:
23378061
PMCID:
PMC3777275
DOI:
10.1007/s11764-013-0265-y
[PubMed - indexed for MEDLINE]
Free PMC Article
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