The Effects of Serum Testosterone, Estradiol, and Sex Hormone Binding Globulin Levels on Fracture Risk in Older Men Export

@article{citeulike:5165341, abstract = {Context: The relationship between sex steroids and fracture is poorly understood. Objective: The objective of the study was to examine associations between nonvertebral fracture risk and bioavailable estradiol (bioE2), bioavailable testosterone (bioT), and SHBG. Design: This was a case-cohort study. Setting: The Osteoporotic Fractures in Men Study (MrOS) was conducted in a prospective U.S. cohort in 5995 community-dwelling men 65 yr old or older. Participants: Participants included a subcohort of 1436 randomly chosen white men plus all 446 minorities and all those with incident hip and other nonvertebral fractures. Main Outcome Measures: Baseline testosterone and estradiol were measured by mass spectrometry (MS) and SHBG by RIA. Results: Men with the lowest bioE2 (<11.4 pg/ml) or highest SHBG (>59.1 nM) had greater risk of all nonvertebral fractures [adjusted hazard ratio (HR) [95\% confidence interval]: 1.5 (1.2-1.9) and 1.4 (1.1-21.8), respectively]. Men with the lowest bioT (<163.5 ng/dl) had no increased fracture risk after adjustment for bioE2 [adjusted HR 1.16 (0.90-1.49)]. A significant interaction between SHBG and bioT (P = 0.03) resulted in men with low bioT and high SHBG having higher fracture risk [HR 2.1 (1.4-3.2)]. Men with low bioE2, low bioT, and high SHBG were at highest risk [HR 3.4 (2.2-5.3)]. Conclusions: Older men with low bioE2 or high SHBG levels are at increased risk of nonvertebral fracture. When SHBG levels are high, men with low bioT levels have higher risk. The strongest association occurred when all measures were considered in combination. 10.1210/jc.2009-0206}, author = {LeBlanc, Erin S. and Nielson, Carrie M. and Marshall, Lynn M. and Lapidus, Jodi A. and Barrett-Connor, Elizabeth and Ensrud, Kristine E. and Hoffman, Andrew R. and Laughlin, Gail and Ohlsson, Claes and Orwoll, Eric S. and for the Osteoporotic Fractures in Men Study Group}, citeulike-article-id = {5165341}, citeulike-linkout-0 = {http://dx.doi.org/10.1210/jc.2009-0206}, citeulike-linkout-1 = {http://jcem.endojournals.org/cgi/content/abstract/94/9/3337}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/19584177}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=19584177}, day = {1}, doi = {10.1210/jc.2009-0206}, journal = {J Clin Endocrinol Metab}, keywords = {estrogen, fractures, malegonadal, risk, testosterone}, month = {September}, number = {9}, pages = {3337--3346}, posted-at = {2009-07-15 22:35:23}, priority = {2}, title = {The Effects of Serum Testosterone, Estradiol, and Sex Hormone Binding Globulin Levels on Fracture Risk in Older Men}, url = {http://dx.doi.org/10.1210/jc.2009-0206}, volume = {94}, year = {2009} }

TY - JOUR ID - citeulike:5165341 L3 - citeulike-article-id:5165341 N2 - Context: The relationship between sex steroids and fracture is poorly understood. Objective: The objective of the study was to examine associations between nonvertebral fracture risk and bioavailable estradiol (bioE2), bioavailable testosterone (bioT), and SHBG. Design: This was a case-cohort study. Setting: The Osteoporotic Fractures in Men Study (MrOS) was conducted in a prospective U.S. cohort in 5995 community-dwelling men 65 yr old or older. Participants: Participants included a subcohort of 1436 randomly chosen white men plus all 446 minorities and all those with incident hip and other nonvertebral fractures. Main Outcome Measures: Baseline testosterone and estradiol were measured by mass spectrometry (MS) and SHBG by RIA. Results: Men with the lowest bioE2 (<11.4 pg/ml) or highest SHBG (>59.1 nM) had greater risk of all nonvertebral fractures [adjusted hazard ratio (HR) [95% confidence interval]: 1.5 (1.2-1.9) and 1.4 (1.1-21.8), respectively]. Men with the lowest bioT (<163.5 ng/dl) had no increased fracture risk after adjustment for bioE2 [adjusted HR 1.16 (0.90-1.49)]. A significant interaction between SHBG and bioT (P = 0.03) resulted in men with low bioT and high SHBG having higher fracture risk [HR 2.1 (1.4-3.2)]. Men with low bioE2, low bioT, and high SHBG were at highest risk [HR 3.4 (2.2-5.3)]. Conclusions: Older men with low bioE2 or high SHBG levels are at increased risk of nonvertebral fracture. When SHBG levels are high, men with low bioT levels have higher risk. The strongest association occurred when all measures were considered in combination. 10.1210/jc.2009-0206 IS - 9 JF - J Clin Endocrinol Metab EP - 3346 TI - The Effects of Serum Testosterone, Estradiol, and Sex Hormone Binding Globulin Levels on Fracture Risk in Older Men VL - 94 SP - 3337 KW - estrogen KW - fractures KW - malegonadal KW - risk KW - testosterone AU - LeBlanc, Erin AU - Nielson, Carrie AU - Marshall, Lynn AU - Lapidus, Jodi AU - Barrett-Connor, Elizabeth AU - Ensrud, Kristine AU - Hoffman, Andrew AU - Laughlin, Gail AU - Ohlsson, Claes AU - Orwoll, Eric AU - for the Osteoporotic Fractures in Men Study Group PY - 2009/09/01/ UR - http://dx.doi.org/10.1210/jc.2009-0206 ER -