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Circulating steroid hormones and the risk of prostate cancer

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dc.contributor.authorSeveri, G.
dc.contributor.authorMorris, H.
dc.contributor.authorMacInnes, R.
dc.contributor.authorEnglish, D.
dc.contributor.authorTilley, W.
dc.contributor.authorHopper, J.
dc.contributor.authorBoyle, P.
dc.contributor.authorGiles, G.
dc.date.issued2006
dc.description© 2006 American Association for Cancer Research
dc.description.abstractEpidemiologic studies have failed to support the hypothesis that circulating androgens are positively associated with prostate cancer risk and some recent studies have even suggested that high testosterone levels might be protective particularly against aggressive cancer. We tested this hypothesis by measuring total testosterone, androstanediol glucuronide, androstenedione, DHEA sulfate, estradiol, and sex hormone-binding globulin in plasma collected at baseline in a prospective cohort study of 17,049 men. We used a case-cohort design, including 524 cases diagnosed during a mean 8.7 years follow-up and a randomly sampled subcohort of 1,859 men. The association between each hormone level and prostate cancer risk was tested using Cox models adjusted for country of birth. The risk of prostate cancer was ∼30% lower for a doubling of the concentration of estradiol but the evidence was weak (Ptrend = 0.07). None of the other hormones was associated with overall prostate cancer (Ptrend ≥ 0.3). None of the hormones was associated with nonaggressive prostate cancer (all Ptrend ≥ 0.2). The hazard ratio [HR; 95% confidence interval (95% CI)] for aggressive cancer almost halved for a doubling of the concentration of testosterone (HR, 0.55; 95% CI, 0.32-0.95) and androstenedione (HR, 0.51; 95% CI, 0.31-0.83), and was 37% lower for a doubling of the concentration of DHEA sulfate (HR, 0.63; 95% CI, 0.46-0.87). Similar negative but nonsignificant linear trends in risk for aggressive cancer were obtained for free testosterone, estradiol, and sex hormone-binding globulin (Ptrend = 0.06, 0.2, and 0.1, respectively). High levels of testosterone and adrenal androgens are thus associated with reduced risk of aggressive prostate cancer but not with nonaggressive disease.
dc.description.statementofresponsibilityGianluca Severi, Howard A. Morris, Robert J. MacInnis, Dallas R. English, Wayne Tilley, John L. Hopper, Peter Boyle, and Graham G. Giles
dc.identifier.citationCancer Epidemiology, Biomarkers and Prevention, 2006; 15(1):86-91
dc.identifier.doi10.1158/1055-9965.EPI-05-0633
dc.identifier.issn1055-9965
dc.identifier.issn1538-7755
dc.identifier.orcidMorris, H. [0000-0002-2745-3750]
dc.identifier.orcidTilley, W. [0000-0003-1893-2626]
dc.identifier.urihttp://hdl.handle.net/2440/23333
dc.language.isoen
dc.publisherAmer Assoc Cancer Research
dc.source.urihttp://cebp.aacrjournals.org/content/15/1/86.full?sid=c0299f3e-598f-4606-92bb-fe9b2f0dd723
dc.subjectHumans
dc.subjectProstatic Neoplasms
dc.subjectTestosterone
dc.subjectGonadal Steroid Hormones
dc.subjectSex Hormone-Binding Globulin
dc.subjectProportional Hazards Models
dc.subjectRisk Assessment
dc.subjectCase-Control Studies
dc.subjectCohort Studies
dc.subjectProspective Studies
dc.subjectReproducibility of Results
dc.subjectAdult
dc.subjectAged
dc.subjectAged, 80 and over
dc.subjectMiddle Aged
dc.subjectAustralia
dc.subjectMale
dc.titleCirculating steroid hormones and the risk of prostate cancer
dc.typeJournal article
pubs.publication-statusPublished

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