Background: Functional hypogonadism is a common disorder among patients with obesity and type 2 diabetes mellitus and could be managed by first treating the underlying causes. Objective: The present study was undertaken to investigate the contribution of body weight and glycemic control to the reversibility of hypogonadism to eugonadism in a real-life setting. Materials and methods: Adult obese male patients with uncontrolled type 2 diabetes mellitus, complaining of mild to moderate erectile dysfunction and suspected of functional hypogonadism evaluated at our institution from 2015 to 2017, were retrospectively included. The gonadal status 3 and 12 months after the glucose-lowering medication prescription was assessed. Results: Seventy-one consecutive patients were enrolled, with 24 (34%) of them achieving total testosterone ≥300 ng/dL (10.4 nM/L) at the end of the study. When they were stratified according to HbA1c and body weight loss, a direct correlation was found for the latter only. Particularly, 94% of patients achieving a body weight loss >10% presented with total testosterone ≥300 ng/dL. An inverse correlation was found for HbA1c, with no higher prevalence of total testosterone ≥300 ng/dL in patients with HbA1c <6.5%. Discussion: The findings are strengthened by the rigorous study design. However, a limited number of patients and glucose-lowering medications could be included. Conclusions: The present study supports the hypothesis that in obese patients with uncontrolled type 2 diabetes mellitus losing weight may have a greater impact on androgens compared to improving glycemic control. Further prospective studies are needed to corroborate this finding.
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