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    Nevus count, pigmentary characteristics, and melanoma-specific mortality among Norwegian women with melanoma >1.0 mm thick

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    Authors
    Ahimbisibwe, A.
    Valberg, M.
    Green, Adèle C
    Ghiasvand, R.
    Rueegg, C. S.
    Rimal, R.
    Weiderpass, E.
    Sandanger, T. M.
    Robsahm, T. E.
    Veierød, M. B.
    Affiliation
    Oslo Centre for Biostatistics and Epidemiology, Department of Biostatistics, University of Oslo, Oslo, Norway.
    Issue Date
    2023
    
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    Abstract
    Little is known about if and how nevi and pigmentation are associated with melanoma-specific mortality. However, increased melanoma awareness in people with lighter pigmentation and many nevi may result in earlier diagnosis of thinner less-lethal tumors. The aim of this study was to investigate associations between nevus count (asymmetrical > 5 mm and small symmetrical), pigmentary characteristics (hair colour, eye colour, skin colour, freckling, pigmentary score), and melanoma-specific mortality in subjects with melanomas > 1 mm. Data from the Norwegian Women and Cancer cohort, established in 1991, with complete follow-up of melanoma patients until 2018 through the Cancer Registry of Norway, were used to estimate hazard ratios with 95% confidence intervals for the associations between nevus count, pigmentary characteristics, and melanoma-specific mortality, stratified by tumor thickness using Cox regression. Estimated hazard ratios consistently indicated a higher risk of melanoma death for those with darker vs lighter pigmentary characteristics in patients with tumors > 1.0-2.0 mm and > 2.0 mm thick (e.g. pigmentary score hazard ratio 1.25, 95% confidence interval (0.74-2.13)). Among women with melanomas > 1.0 mm thick, lighter pigmentation and asymmetrical nevi may be associated with lower melanoma-specific mortality, suggesting that factors that increase the risk of melanoma may also be associated with decreased risk of death from melanoma.
    Citation
    Ahimbisibwe A, Valberg M, Green AC, Ghiasvand R, Rueegg CS, Rimal R, et al. Nevus Count, Pigmentary Characteristics, and Melanoma-specific Mortality among Norwegian Women with Melanoma >1.0 mm Thick. Acta Derm Venereol. 2023 Apr 4;103:adv4403. PubMed PMID: 37014267. Epub 2023/04/05. eng.
    Journal
    Acta Dermato-Venereologica
    URI
    http://hdl.handle.net/10541/626188
    DOI
    10.2340/actadv.v103.4403
    PubMed ID
    37014267
    Additional Links
    https://dx.doi.org/10.2340/actadv.v103.4403
    Type
    Article
    Language
    en
    ae974a485f413a2113503eed53cd6c53
    10.2340/actadv.v103.4403
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