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Background: The aim of this study was to evaluate the relationship between mean platelet volume (MPV) and vitamin D levels according to ED severity. Methods: Between October 2015 and September 2017, patients who applied to the andrology outpatient clinic with an ED complaint were retrospectively reviewed. Patients with diabetes, hypertension, hyperlipidemia, malignancy, late-onset hypogonadism and smokers were not included in the study. The International Erectile Function Index-Erectile Function (IIEF-EF) questionnaire was used to assess the levels of erectile function. According to this scoring system, patients were divided into two groups. IIEF score: between 17 and 25 = mild ED (Group 1) and IIEF score between 16 and 0 = moderate-severe ED (Group 2). Blood samples of the patients were taken from antecubital vein and MPV and 25-hydroxyvitamin D [25(OH)D] levels were evaluated. Results: Ninety patients were included in the study (Group 1: n  = 41, Group 2: n  = 49). The mean age of the patients was 41.07 ± 8.56 and the mean body mass index (BMI) was 27.59 ± 3.91. 25(OH)D levels were found to be statistically lower in Group 2 (18.85 ± 6.09; 13.98 ± 7.10; p  = .001). MPV levels were found to be statistically higher in Group 2 (10.05 ± 0.81; 10.78 ± 1.16; p  = .001). Correlation between IIEF-EF scores and 25(OH)D levels was positive ( p  = .03, r  = 0.22). There was negative correlation between IIEF-EF scores and MPV and between 25(OH)D levels and MPV levels [ p  = .003 for IIEF-EF/MPV, p  = .04, r  = -0.23 for 25(OH)D/MPV]. Conclusion: There is a significant positive correlation between ED severity and 25(OH)D levels and there is a significant negative correlation between ED severity and MPV levels.

The aim of this study is to investigate whether serum vitamin D level predicts the risk of Peyronie's disease. Calcium and inflammatory cytokines play an important role during fibrocalcification of the plaques in Peyronie's Disease. TGF-β1 is one of the most fibrogenic cytokines. Increasing serum vitamin D levels is considered that induce expression of TGF-β1. Serum vitamin D levels and TGF-β1 are related with calcifications of some soft tissues in previous studies. One hundred and three Peyronie patients and 162 healthy volunteers were included in the study. In both groups, demographic data, medical history, physical examination and erectile capacity were recorded. Serum 25-hydroxyvitamin D, total cholesterol, low-density lipoprotein, high-density lipoprotein, triglyceride and testosterone levels were measured. The mean level of serum 25 (OH) D was significantly higher in men with Peyronie's disease compared with the controls (32.6 ± 7.9 ng/ml vs. 18.5 ± 6.6 ng/ml respectively. p < 0.001). There is a relationship between Peyronie's disease and high serum vitamin D levels. Also, increased low-density lipoprotein and total cholesterol levels, diabetes mellitus, and cardiovascular diseases were associated with Peyronie's disease., (© 2019 Blackwell Verlag GmbH.)

Purpose: To investigate the relationship between 25-hydroxyvitamin D (25 (OH) D) levels and acquired premature ejaculation (PE)., Materials and Methods: A total of 97 patients with acquired PE and 64 healthy men as a control group selected from volunteers without PE attending our Andrology Outpatient Clinic between November 2016 and April 2017 were included the study. All patients were considered to have acquired PE if they fulfilled the criteria of the second Ad Hoc International Society for Sexual Medicine Committee. Premature ejaculation diagnostic tool questionnaires were used to assessment of PE and all participants were instructed to record intravaginal ejaculatory latency time. Vitamin D levels were evaluated in all participants using high performance liquid chromatography method included in the study., Results: Compared to men without PE, the patients with acquired PE had significantly lower 25 (OH) D levels (12.0 ± 4.5 ng/mL vs. 18.2 ± 7.4 ng/mL, p < 0.001). In the logistic regression analysis, 25 (OH) D was found to be an independent risk factor for acquired PE, with estimated odds ratios (95% CI) of 0.639 (0.460-0.887, p = 0.007) and the area under curve of the ROC curve of 25 (OH) D diagnosing acquired PE was 0.770 (95% CI: 0.695 to 0.844, p < 0.001). The best cut-off value was 16 ng/mL with a sensitivity of 60.9%, specificity of 83.5%, PPV of 70.9%, and NPV of 76.4% to indicate acquired PE., Conclusions: This study demonstrates that lower vitamin D levels are associated with the acquired PE. The result of our study showed that the role of serum vitamin D levels should be investigate in the etiology of acquired PE. Perhaps supplementation of vitamin D in men with acquired PE will ameliorate the sexual health of these patients., Competing Interests: None declared., (Copyright® by the International Brazilian Journal of Urology.)