Key result
Being physically active prior to cancer diagnosis was associated with a 23% reduced risk of cancer mortality compared to being inactive (HR 0.77; 95% CI 0.63-0.94; P=0.01).
Why the study?
The preventive role of precancer diagnosis cardiorespiratory fitness and physical activity in cancer mortality is poorly characterized.
Does higher cardiorespiratory fitness and physical activity prior to cancer diagnosis reduce cancer mortality in men?
Cohort (n=699)
Does higher cardiorespiratory fitness and physical activity prior to cancer diagnosis reduce cancer mortality in men?
Higher cardiorespiratory fitness and physical activity prior to cancer diagnosis are associated with significantly lower cancer mortality in men.
Answers are grounded in this paper and cite their sources.
Supports pre-diagnosis activity for lower cancer mortality; hypothesis-generating pending randomized confirmation.
BACKGROUND: The preventive role of precancer diagnosis cardiorespiratory fitness (CRF) and physical activity (PA) in cancer mortality is poorly characterized. The aim of this study was to assess the association between CRF, PA at precancer-diagnosis and cancer mortality in men who diagnosed with cancer later in life. METHODS: A total of 699 men (63±10 years) who were diagnosed with cancer during 7.5±4.9 years from a baseline treadmill exercise test and reported PA were analyzed. Multivariate Cox models for CRF and univariate model for PA were conducted. Population Attributable Risks (PARs%) and exposure impact number (EIN) of low CRF (<5 METs) and inactivity were determined. RESULTS: During 6.5±5.2 years from cancer diagnosis, 56% died from cancer. CRF was inversely, graded and independently associated with cancer death. A 1-MET increase and categories of moderate and high CRF were associated with 7%, 28% and 51% reductions in risk of cancer death, respectively. Active compared to inactive individuals had a 23% reduced risk of cancer mortality (HR=0.77, 95% CI [0.63-0.94], P=0.01). PARs% of low CRF and inactivity were 4.8% and 9.4%, respectively, while the respective EIN were 3 and 9. CONCLUSIONS: Higher CRF and being active at precancer-diagnosis were associated with lower cancer mortality and longer survival time in men who developed cancer later in life. Screening and intervening for low CRF and inactivity as risk factors during middle-age and maintaining at least moderate CRF and activity levels may be effective strategies for prevention of cancer mortality.
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Vainshelboim et al. (2019) conducted a cohort in Cancer (n=699). Physical activity (active) vs. Inactivity was evaluated on Cancer mortality (HR 0.77, 95% CI 0.63-0.94, p=0.01). Being physically active prior to cancer diagnosis was associated with a 23% reduced risk of cancer mortality compared to being inactive (HR 0.77; 95% CI 0.63-0.94; P=0.01).
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