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Walser-Domjan, E.* ; Richard, A.* ; Eichholzer, M.* ; Platz, E.A.* ; Linseisen, J. ; Rohrmann, S.*

Association of urinary phytoestrogen concentrations with serum concentrations of prostate-specific antigen in the National Health and Nutrition Examination Survey.

Nutr. Cancer 65, 813-819 (2013)
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Some clinical trials have shown that high phytoestrogen intake may decrease serum concentrations of prostate-specific antigen (PSA), and phytoestrogens may also lower prostate cancer risk. It was the aim of this study to examine the relationship between the serum PSA level and urine phytoestrogen concentration in generally healthy U.S. men. Eight hundred twenty-four men, 40+ yr old without prostate cancer, who participated in the 2001-2004 NHANES surveys, were included in the analysis. The association of total PSA, free PSA, and PSA ratio [free PSA/total PSA * 100] with concentrations of isoflavones and lignans (standardized for urinary creatinine concentration) was examined using multivariable-adjusted linear and logistic regression models. The linear regression analyses showed no clear association between creatinine-standardized urinary phytoestrogen concentrations and serum total or free PSA levels or PSA ratio. However, the odds of having a PSA ratio <15% rose from Quartile 1 to Quartile 4 of isoflavone excretion (odds ratio = 2.82, 95% confidence interval 1.28-6.22 for top vs. bottom quartile), but there were no associations with having a PSA ratio <25%. In generally healthy U.S. men, 40+ yr old without a diagnosis of prostate cancer, urinary isoflavone, and lignan concentrations were not associated with serum PSA level.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Services Task-force ; Dietary Soy Intake ; Clinical-trial ; United-states ; American Men ; Lncap Cells ; Cancer ; Isoflavone ; Population ; Consumption
ISSN (print) / ISBN 0163-5581
e-ISSN 1532-7914
Zeitschrift Nutrition and Cancer
Quellenangaben Band: 65, Heft: 6, Seiten: 813-819 Artikelnummer: , Supplement: ,
Verlag Routledge, Taylor & Francis Group
Begutachtungsstatus Peer reviewed