OBJECTIVE: To study and establish sex hormone cutoff levels for osteoporosis risk in men over 50 years old. METHODS: Case-control study of 216 men > 50 years, 110 with osteoporosis (O) and 106 with normal bone density (C). We measured estradiol (E2), sex hormone binding globulin (SHBG), total testosterone (TT) and albumin. Free testosterone (FT) and bioavailable testosterone (BT) were calculated through Vermeulen’s formula. RESULTS: There was no difference in TT between groups. Relative risks of osteoporosis were 1.89 for […]

To study the role of clinical, demographic and laboratory factors on the levels of sex steroids, we studied 28 men with type 2 diabetes (DM2) and 27 non-diabetic controls. Body mass index (BMI), waist size and waist-hip ratio (WHR) were measured in all, as well as, glucose, hemoglobin A1c, insulin, peptide C, estradiol, testosterone, and SHBG. The free testosterone index (FTI) was calculated by dividing total testosterone (TT) by SHBG. The HOMA-R index was used as a measure of insulin […]

Hyperinsulinemia may contribute to hyperandrogenism because it reduces the levels of SHBG and IGFBP-1. In this study we determined serum levels of SHBG and IGFBP-1 and their association with androgen and insulin in 44 selected girls with premature pubarche (PP) and 18 pre-pubertal controls (C) (7.3±1.3 x 6.8±1.6years). The body mass index (BMI) and bone age (BA) were determined, as well as the serum levels of SHBG, IGFBP-1, insulin (I), glucose (G), testosterone (T), DHEAS, androstenedione (A), 17-hydroxyprogesterone (17OHP) and […]

We investigated in 26 girls with premature pubarche (PP) and 14 age-matched controls (7.3±1.0 x 7.0±2.0 years) the role of adrenal and peripheral androgens in the regulation of sex hormone-binding globulin (SHBG) during childhood. Bone age (BA) and body mass index (BMI) were determined, together with androstenedione (A), testosterone (T), dehydroepiandrosterone and its sulfate (DHEA and DHEAS), dihydrotestosterone (DHT), 3a-androstanediol glucuronide (3a-diolG) and SHBG. Although BA was similar (8.0±1.4 x 8.3±1.4 years), BMI was higher in PP (18.7±3.1 x 16.7±2.0, […]

Com o objetivo de analisar as concentrações plasmáticas de SHBG, dos esteróides sexuais, perfil glicídico, lipídico e suas relações com variáveis clínicas, demográficas e medidas antropométricas, estudamos um grupo de 80 mulheres na pós-menopausa, 40 com diabetes mellitus (DM) tipo 2, com idade de 64,9±7,1 anos e duração conhecida do diabetes de 13,4±1,4 anos e 40 não diabéticas com idade de ól±8,9 anos. Foram analisados: idade, índice de massa corporal (IMC), relação cintura-quadril (RCQ), cintura, pressão arterial sistólica (PAs) e […]