THU651 Testosterone Treatment And Sexual Function In Men With Or At Risk Of T2D: The T4DM Study

Disclosure: G.A. Wittert: Advisory Board Member; Self; Bayer Schering Pharma. Speaker; Self; Bayer Schering Pharma, Besin. K. Robledo: None. M. Grossmann: None. B.B. Yeap: Advisory Board Member; Self; Bayer Schering Pharma. Grant Recipient; Self; Bayer Schering Pharma, Lawley. B.G. Stuckey: None. W.J. Inder: None. K. Bracken: None. D.R. Jesudason: None. C.A. Allan: None. D.J. Handelsman: None. Background: In T4DM (men aged 50 – 74 yrs., waist circumference (WC) ≥95cm cm, prediabetes, or newly diagnosed type 2 diabetes (T2D) and serum testosterone (T) ≤ 14 nmol/L), 2 years treatment with T-undecanoate (1000 mg IM 3 monthly) vs placebo while enrolled in a lifestyle weight management program, decreased fat mass, and reduced the risk of T2D by 40%. Aim: To determine baseline predictors and T treatment effects on sexual function (SF) over time, including interactions with changes in waist circumference (WC), blood pressure (BP), glucose and mood. Methods: Adjusting for baseline sociodemographic, clinical parameters and serum sex steroid (LCMS) concentrations, linear mixed effects models were fitted to assess T treatment effects on measures of SF (erectile function (EF), sexual desire (SD), orgasmic function (OF), intercourse satisfaction (IS) and overall satisfaction (OS) via questionnaire (IIEF)) completed by each participant at baseline and weeks 30, 54, 78, and 102, together with WC, BP, glucose, trough T, estradiol (E), T:E ratio and mood (Center for Epidemiologic Studies Depression Scale (CES-D) at weeks 0, 54 and 102. Results Among men on T (504) or placebo (503) at baseline, age was inversely associated with all SF scales (p <0.001), and WC and CES-D score inversely associated with EF (p=0.041) and SD (p=0.029). There was no effect of baseline T, E or T:E ratio on SF. T treatment improved all SF measures (p<0.001) peaking at 30-54 weeks). The T treatment effect on SD and OF (both p-int=0.014) was greater in older men. Increasing WC over time was inversely associated with EF (p=0.036) and SD (p=0.043) scores, with no interaction with T treatment. SF scores were unaffected by changes in glucose, BP, or trough T, E or T:E ratio. Increase in depression scores corresponded to decreases in all SF scores (p <0.001). T treatment increased SD more in those with higher depression scores (p int=0.026) while not affecting the CES-D scores. Conclusion: Baseline age, WC, and depression scores, but not T were inversely associated with SF measures which improved with T treatment regardless of baseline T, E, or T:E ratio. T treatment improved SD and OF more in older men, and SD in those with more depressive symptoms. Change in WC was inversely associated with EF and SD, independent of T treatment. A pharmacological effect of T treatment to improve SF, particularly in older and depressed men, coexists with benefits from reduced central adiposity. Presentation: Thursday, June 15, 2023