Hillreiner, A.* ; Baumeister, S. ; Sedlmeier, A.M.* ; Finger, J.D.* ; Schlitt, H.J.* ; Leitzmann, M.F.*
     
    
        
Association between cardiorespiratory fitness and colorectal cancer in the UK Biobank.
    
    
        
    
    
        
        Eur. J. Epidemiol. 35, 961–973 (2020)
    
    
    
      
      
	
	    Increased cardiorespiratory fitness is related to decreased risk of major chronic illnesses, including cardiovascular disease, type 2 diabetes, and cancer, but its association with colorectal cancer specifically has received very little attention. We examined the relation of cardiorespiratory fitness to colorectal cancer in 59,191 UK Biobank participants aged 39–70 years without prevalent cancer at baseline, followed from 2009 to 2014. Submaximal bicycle ergometry was conducted at study entry, and cardiorespiratory fitness was defined as physical work capacity at 75% of the maximum heart rate, standardised to body mass (PWC75%). Multivariable Cox proportional hazards regression was performed to obtain hazard ratios (HR) and corresponding 95% confidence intervals (CI). During a mean follow-up of 4.6 years, 232 participants developed colorectal cancer (151 colon cancers; 79 rectal cancers). When comparing the 75th to the 25th percentiles of PWC75%, the multivariable-adjusted HR of colorectal cancer was 0.78 (95% CI 0.62–0.97). That relation was largely driven by an inverse association with colon cancer (HR 0.74, 95% CI 0.56–0.97) and less so with rectal cancer (HR 0.88, 95% CI 0.62–1.26; p value for difference by colorectal cancer endpoint = 0.056). The inverse relation of cardiorespiratory fitness with colorectal cancer was more evident in men (HR 0.72, 95% CI 0.55–0.94) than women (HR 0.99, 95% CI 0.71–1.38), although the gender difference was not statistically significant (p value for interaction = 0.192). Increased cardiorespiratory fitness is associated with decreased risk of colorectal cancer. Potential heterogeneity by colorectal cancer anatomic subsite and gender requires further study.
	
	
	    
	
       
      
	
	    
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        Publication type
        Article: Journal article
    
 
    
        Document type
        Scientific Article
    
 
    
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        Keywords
        Cardiorespiratory Fitness ; Colorectal Cancer ; Gender-specific ; Incidence ; Uk Biobank
    
 
    
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        Language
        english
    
 
    
        Publication Year
        2020
    
 
    
        Prepublished in Year
        2019
    
 
    
        HGF-reported in Year
        2019
    
 
    
    
        ISSN (print) / ISBN
        0393-2990
    
 
    
        e-ISSN
        1573-7284
    
 
    
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	    Volume: 35,  
	    Issue: ,  
	    Pages: 961–973 
	    Article Number: ,  
	    Supplement: ,  
	
    
 
    
        
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            Springer
        
 
        
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        Reviewing status
        Peer reviewed
    
 
     
    
        POF-Topic(s)
        30202 - Environmental Health
    
 
    
        Research field(s)
        Genetics and Epidemiology
    
 
    
        PSP Element(s)
        G-502900-001
    
 
    
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        Erfassungsdatum
        2019-11-14