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Published in: BMC Cancer 1/2016

Open Access 01-12-2016 | Research article

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

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

Published in: BMC Cancer | Issue 1/2016

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Abstract

Background

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

Methods

We 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.

Results

The 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.

Conclusions

Hair dye use increased the risk of prostate cancer, whereas regular exercise reduced the number of prostate-cancer-specific deaths.
Appendix
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Metadata
Title
Hair dye use, regular exercise, and the risk and prognosis of prostate cancer: multicenter case–control and case-only studies
Authors
Shu-Yu Tai
Hui-Min Hsieh
Shu-Pin Huang
Ming-Tsang Wu
Publication date
01-12-2016
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2016
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-016-2280-7

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