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    Life-course trajectories of physical activity and melanoma risk in a large cohort of norwegian women

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    Authors
    Perrier, F.
    Ghiasvand, R.
    Lergenmuller, S.
    Robsahm, T. E.
    Green, Adèle C
    Borch, K. B.
    Sandanger, T. M.
    Weiderpass, E.
    Rueegg, C. S.
    Veierød, M. B.
    Affiliation
    Oslo Centre for Biostatistics and Epidemiology, Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norwa
    Issue Date
    2022
    
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    Abstract
    Purpose: Physical activity (PA) is a cornerstone in disease prevention and varies throughout life. A pooled analysis of cohort studies and a meta-analysis of cohort studies found positive associations between PA and melanoma risk. However, previous studies focused on PA at specific ages and often lacked information on ultraviolet radiation (UVR) exposure. Using the population-based Norwegian Women and Cancer (NOWAC) cohort, including information on PA and UVR exposure, we estimated life-course PA trajectories from adolescence to adulthood and their associations with melanoma. Methods: Total PA across different domains (recreation, occupation, transport, household) was reported for ages 14 and 30 years, and when responding to the questionnaire (31-76 years) using a 10-point scale, validated to rank PA levels in Norwegian females. We estimated life-course PA trajectories using a latent class mixed model in 152,248 women divided into three subcohorts depending on age at questionnaire completion: 31-39 (n = 27,098), 40-49 (n = 52,515) and ≥50 years (n = 72,635). The unique 11-digit identity number of Norwegian citizens was used to link NOWAC to the Cancer Registry of Norway for information on cancer diagnoses, emigration and death. Associations between PA trajectories and melanoma risk were estimated in each subcohort using multivariable Cox regression. Results: Five classes of individual life-course PA trajectories were identified in subcohort 31-39 years (low, moderate, high, decreasing, increasing PA) and four in subcohorts 40-49 and ≥50 years (low, moderate, high, decreasing PA). No significant association was found between life-course PA trajectories and melanoma risk in any subcohort. Hazard ratios (95% confidence intervals) for the high versus moderate trajectory were 0.92 (0.66-1.29), 1.15 (0.97-1.37) and 0.90 (0.78-1.05) for subcohorts 31-39, 40-49 and ≥50 years, respectively. Conclusion: Our results do not support a positive association between PA and melanoma risk found in previous studies, which is important for public health guidelines promoting regular PA.
    Citation
    Perrier F, Ghiasvand R, Lergenmuller S, Robsahm TE, Green AC, Borch KB, et al. Life-Course Trajectories of Physical Activity and Melanoma Risk in a Large Cohort of Norwegian Women. Clin Epidemiol. 2022;14:1571-84. PubMed PMID: 36578536. Pubmed Central PMCID: PMC9791937. Epub 2022/12/30. eng.
    Journal
    Clinical Epidemiology
    URI
    http://hdl.handle.net/10541/625935
    DOI
    10.2147/clep.s382454
    PubMed ID
    36578536
    Additional Links
    https://dx.doi.org/10.2147/clep.s382454
    Type
    Article
    Language
    en
    ae974a485f413a2113503eed53cd6c53
    10.2147/clep.s382454
    Scopus Count
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