Hair dye use, regular exercise, and the risk and prognosis of prostate cancer: multicenter case–control and case-only studiesReportar como inadecuado




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BMC Cancer

, 16:242

Epidemiology, prevention and public health

Abstract

BackgroundThis study investigated the effects that hair dye use and regular exercise exert on the risk and prognosis of prostate cancer.

MethodsWe studied 296 cases of histologically confirmed prostate cancer and 296 age- in 2-y bands, ethnicity-, and hospital-matched controls in Taiwan between August 2000 and December 2008. To determine the rate of prostate cancer survival, another 608 incident prostate cancer cases occurring between August 2000 and December 2007 were investigated. Information on hair dye use and regular exercise was obtained using a standardized questionnaire.

ResultsThe use of hair dyes was associated with a significant 2.15-fold odds of developing prostate cancer adjusted odds ratio = 2.15, 95 % confidence interval CI = 1.32–3.57, but was not associated with prostate cancer survival, compared with no use. The significant risks were more prominent in users aged < 60 years who had used hair dyes for > 10 years, > 6 times per year, and started using hair dyes before 1980. By contrast, regular exercise significantly reduced the number of prostate-cancer-specific death adjusted hazard ratio = 0.37, 95 % CI = 0.16–0.83; the protective effect of exercise was more prominent among cancer patients who exercised daily ≥7 times-week. However, exercise could not prevent the development of prostate cancer.

ConclusionsHair dye use increased the risk of prostate cancer, whereas regular exercise reduced the number of prostate-cancer-specific deaths.

KeywordsProstate cancer Hair dye Regular exercise Risk Survival Case–control study AbbreviationsAJCCAmerican Joint Committee on Cancer

BMIbody mass index

CIsconfidence intervals

HRshazard ratios

KMUHKaohsiung Medical University Hospital

KVGHKaohsiung Veterans General Hospital

NTUHNational Taiwan University Hospital

ORsodds ratios

PSAprostate-specific antigen

Electronic supplementary materialThe online version of this article doi:10.1186-s12885-016-2280-7 contains supplementary material, which is available to authorized users.

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Autor: Shu-Yu Tai - Hui-Min Hsieh - Shu-Pin Huang - Ming-Tsang Wu

Fuente: https://link.springer.com/







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