Indian Journal of Endocrinology and Metabolism (Jan 2019)
Sex hormone levels – Estradiol, testosterone, and sex hormone binding globulin as a risk marker for atherosclerotic coronary artery disease in post-menopausal women
Abstract
Context: Sex hormones levels determine the risk of occurrence of coronary artery disease (CAD) in post-menopausal (PM) women. Aims: To investigate the relationship between sex hormones (estradiol and testosterone)/sex hormone binding globulin (SHBG) and cardiovascular risk factors in PM women. In addition, we learned the association between these sex hormones/SHBG and the occurrence of atherosclerotic CAD event in PM women. Settings and Design: Cross-sectional case- control study. Subjects and Methods: Subjects recruited in the present study were from the cardiology outpatient clinic or Emergency department Guwahati Medical College and Hospital, Assam. The subjects were grouped into two categories after appropriate exclusion criteria: Cases – PM women with documented CAD (n = 40) and controls – Healthy PM women (n = 30). The medical history, clinical examination, and investigations including serum estradiol, total testosterone, SHBG, free testosterone index (FTI), high-sensitivity C-reactive protein (hs-CRP), lipid profile, carotid intima-media thickness (CIMT), fasting plasma glucose (FPG), and postprandial plasma glucose (PPPG) were done and analyzed. Statistical Analysis Used: Pearson correlation between sex hormones and CAD risk factors was done. The association between sex hormones and CAD risk factors among PM women was analyzed by multiple logistic regression. The statistical significance was set at the 0.05 level. Results: The mean age of all the subjects was 62.27 ± 6.9 years. Among the cases, a significant positive correlation was found between total testosterone/FTI and waist circumference, W/H ratio, triglyceride levels, hs-CRP, and CIMT (P < 0.01). In addition, a significant negative correlation was found between total testosterone and FTI with high-density lipoprotein-cholesterol levels (P < 0.01). The multiple logistic regression analysis showed that total testosterone levels (P < 0.01) and SHBG (P < 0.01) are independently associated with the occurrence of atherosclerotic CAD in PM. Conclusion: We conclude that increased serum testosterone levels and low SHBG in PM women are associated with the development of atherosclerotic cardiovascular risk factors.
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