Predictive value of systemic inflammatory response index in patients with erectile dysfunction on tadalafil unresponsive patients
Abstract
Abstract Background Erectile dysfunction (ED) is a common disorder that significantly impacts quality of life, and phosphodiesterase type 5 inhibitors (PDE5is) such as tadalafil are one of the primary treatments. However, some patients remain unresponsive, necessitating further investigation. Objective To investigate the association between systemic inflammatory response index (SIRI) and tadalafil unresponsiveness in erectile dysfunction patients. Methods A total of 106 male patients who applied to the Andrology outpatient clinic with ED complaints between January and June 2024 were included in the study. Patients were started on daily tadalafil 5 mg therapy, and response was assessed after one month using the International Index of Erectile Function Erectile Function domain (IIEF-EF). SIRI values, calculated using neutrophil, monocyte, and lymphocyte counts, were compared between tadalafil-responsive and unresponsive groups. Results Tadalafil unresponsiveness was observed in 48.1% of patients. Non-responders had significantly higher mean age(57.44 ± 12.52 vs. 47.22 ± 11.49, p < 0.001), BMI(27.22 ± 3.17 vs. 25.85 ± 2.92, p = 0.023), and SIRI values(1.33 ± 0.82 vs. 1.02 ± 0.40, p = 0.016) compared to responders. Multivariate analysis identified age(OR = 1,641, p = 0.001) and SIRI(OR = 2.420, p = 0.014) as independent predictors of tadalafil failure. ROC curve analysis revealed a SIRI cutoff of 1.03 (AUC = 0.617) with 69.1% sensitivity and 61.2% specificity. Conclusion…
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