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Aim: Men with Major Depressive Disorder (MDD) report high rates of sexual dysfunction, as do healthy males with low levels of testosterone. The objective of this study is to evaluate the effects of depression and low testosterone across various domains of sexual function., Methods: Untreated depressed males (N = 44) and age-matched healthy controls (N = 50) had blood samples drawn to determine morning levels of total testosterone (TT) and bioavailable testosterone (BT). In addition, questionnaires regarding depressive symptoms as well as sexual function were administered., Main Outcome Measures: Sexual function outcomes were measured using the Sex Effects (SexFX) Scale and depression severity was assessed with the Hamilton Rating Scale for Depression-17 item (HAMD-17)., Results: Using TT criteria, 27.9% of men were categorically defined as hypogonadal compared to 19.3% using BT criteria. Within both TT and BT hypogonadal groups, men with MDD had lower scores on all domains of sexual function compared to healthy controls with hypogonadism. Testosterone levels interacted with MDD status to affect orgasm and desire, although not arousal. Multiple linear regression analyses revealed that depression status was the main factor influencing sexual function. Hypogonadal status was not a predictor of sexual function in this sample, although age did play a minor role in the domain of arousal., Conclusion: While testosterone levels appear to influence sexual function, specifically orgasm, the presence of MDD appears to be a stronger factor and has high predictive value for sexual outcomes.

Background: Decreased sexual interest and function both occur as a consequence of antidepressant medication use, and are especially associated with serotonin reuptake inhibitors (SRIs). However, few investigators have reported the base rate for disturbances in sexual desire, arousal and orgasm or ejaculation in patients with major depression (MD) prior to antidepressant treatment. The purpose of this report is to define the frequency of sexual dysfunction (SD) in 134 patients with MD and examine the relationship between SD and demographic, clinical and personality variables., Method: A consecutive series of 55 male and 79 female MD patients diagnosed by SCID-DSM IV assessment completed a series of psychometric measures including a Sexual Function Questionnaire, which asked about change in sexual interest and function as well as sexual activity during the preceding month., Results: Only 50% of women and 75% of men reported sexual activity during the preceding month. Over 40% of men and 50% of women reported decreased sexual interest. Reduced levels of arousal were more common in both men and women (40-50%) than ejaculatory or orgasm difficulties (15-20%). In women, problems with arousal and orgasm correlated with higher neuroticism and lower extraversion. There was no relationship between SD and personality measures in men. While age at onset of depression and number of prior episodes showed a modest correlation with SD measures, there were no correlations with severity of depression or specific symptoms clusters., Limitations and Conclusions: Although limited by a relatively small sample of drug free patients with MD, and by the absence of a non-depressed comparison sample, these results emphasize the importance of factors beyond specific drug effects in the assessment of antidepressant related sexual dysfunction.