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Sex Hormone-Binding Globulins and Testosterone Levels as a Risk Marker for Type 2 Diabetes Mellitus among
Uma K Saikia1, P K Jabbar2, Darvin V Das2
1Department of Endocrinology, Guahati Medical College, Guwahati, Assam, India.
Background:
Endogenous sex hormones and sex hormone-binding globulins (SHBG) determine the risk of occurrence of Type 2 diabetes mellitus (T2DM) in postmenopausal (PM) women.
Aims:
To investigate the association between sex hormones (estradiol and testosterone) and SHBG with plasma glucose, fasting insulin levels, HbA1c, and homeostasis model assessment insulin resistance (HOMA-IR) and also to investigate independent role of sex hormones in the occurrence of T2DM among PM.
Settings And Design:
Cross-sectional case-control study.
Subjects And Methods:
The present study was conducted in Endocrinology department Guwahati, Medical College, Assam, India. The participants included cases - PM women with T2DM (n = 100) and controls - Healthy PM women (n = 86). The medical history, clinical examination, and investigations including total testosterone, serum estradiol, SHBG, free testosterone index, high sensitivity C-reactive protein (hs-CRP), lipid profile, fasting insulin, fasting plasma glucose (FPG), and postprandial plasma glucose (PPPG) were done and analyzed. HOMA-IR was calculated.
Statistical Analysis:
Pearson correlation between sex hormone level and SHBG with plasma glucose, HbA1c, fasting insulin, hs-CRP, and HOMA-IR was seen. Multivariance logistic analysis was done to find the independent association between sex hormones/SHBG and the occurrence of T2 DM. P < 0.05 was considered statistically significant.
Results:
Among the cases, a significant positive correlation was found between total testosterone/free testosterone index with waist circumference, FPG PPPG, HbA1c, fasting insulin, and HOMA-IR, and a significant negative correlation was found between SHBG and FPG, PPPG, HbA1c, fasting insulin, and HOMA-IR (P < 0.01). The logistic analysis showed total testosterone levels and SHBG are independently associated with the occurrence of T2 DM among PM (P < 0.01).
Conclusion:
SHBG and testosterone levels in PM can be a risk marker for the development of T2DM.
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