Article
Usual walking pace and risk of 28 cancers: observational and Mendelian randomization analyses
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Published: | September 6, 2024 |
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Outline
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Background: Usual walking pace represents a practical indicator of overall health. However, its role in cancer etiology remains unexplored. We investigated the relation between self-reported walking pace and cancer risk in observational and genetic analyses.
Methods: Using baseline UK Biobank data collected in 2006-2010 among 349,348 participants, we used multivariable Cox proportional hazard models to estimate the association between walking pace (slow, steady average, brisk) and the risk of 28 cancer types, adjusting for overall physical activity and walking volume. We also conducted a two-sample Mendelian randomization (MR) analysis in the UK Biobank to support observational findings by investigating potential causality between walking pace and cancer risk.
Results: After a median follow-up of 10.9 years, 33,330 cancers (9.5% of participants) were diagnosed. Brisk compared with slow walking pace was inversely associated with the risks of six cancers, including anal cancer (hazard ratio 0.31; 95% confidence interval: 0.16-0.61), hepatocellular carcinoma (0.39; 0.24-0.65), thyroid cancer (0.52; 0.32-0.85), lung cancer (0.58; 0.50-0.67), ovarian cancer (0.66; 0.46-0.95), and lip, oral cavity, pharynx cancers combined (0.70; 0.52-0.96). MR analysis based on 450,967 participants further supported these findings. Genetically predicted walking pace was inversely associated with cancers of the oral cavity and pharynx combined (0.17; 0.04-0.76; p=0.021), and cancers of the stomach (0.25; 0.07-0.95; p=0.041), colorectum (0.52; 0.29-0.92; p=0.025) and lung (0.56; 0.32-0.98; p=0.043)
Conclusion: Self-reported walking pace was inversely associated with the risk of six cancer sites, after controlling for overall physical activity and walking volume, supported by MR analyses for four sites. Adopting a brisk walking pace could be an effective public health intervention to reduce the risk of specific cancers, as indicated by both observational and genetic analyses.
The authors declare that they have no competing interests.
The authors declare that a positive ethics committee vote has been obtained.