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dc.contributor.authorScopacasa, F.-
dc.contributor.authorHorowitz, M.-
dc.contributor.authorWishart, R.-
dc.contributor.authorMorris, H.-
dc.contributor.authorChatterton, B.-
dc.contributor.authorNeed, A.-
dc.identifier.citationBone, 2000; 27(1):145-149-
dc.description.abstractThe cause of age-related bone loss in men is poorly understood. Previous studies of the relationship between bone density and serum androgens have yielded inconsistent results, perhaps partly because age is a determinant of both. Recent studies suggest that serum estrogen levels influence bone density in adult men. In order to determine whether bone mineral density (BMD) and bone turnover are associated with serum sex steroids, we investigated 37 normal men within a narrow age range (60-70 years). Bone mineral density at the forearm, hip, and spine, testosterone, sex hormone binding globulin (SHBG), free androgen index (FAI:T/SHBG), estradiol (E), free estradiol index (FEI:E/SHBG), and markers of bone formation (alkaline phosphatase, osteocalcin, procollagen type I C-terminal extension peptide) and bone resorption (hydroxyproline/creatinine [OHPr/Cr], deoxypyridinoline/creatinine [Dpd/Cr], pyridinoline/creatinine, collagen type I cross-linked telopeptide) were measured. Bone mineral density was positively related (r > 0.35, p < 0.05 at all sites) to log FAI, whereas there was no significant relationship between BMD and either serum total testosterone, serum E, or FEI. Bone density at the spine and hip were inversely related to both OHPr/Cr (r > -0.41, p < 0.05 for all sites) and Dpd/Cr (r > -0.36, p < 0.05 for all sites). OHPr/Cr (r = -0.41, p < 0.05) and Dpd/Cr (r = -0.41, p < 0.05) were both inversely related to log FAI. We conclude that BMD and bone turnover in adult men are related to plasma free androgens.-
dc.publisherElsevier Science Inc-
dc.subjectBone Resorption-
dc.subjectBone Density-
dc.subjectMiddle Aged-
dc.titleThe relation between bone density, free androgen index, and estradiol in men 60 to 70 years old-
dc.typeJournal article-
dc.identifier.orcidHorowitz, M. [0000-0002-0942-0306]-
dc.identifier.orcidMorris, H. [0000-0002-2745-3750]-
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