Objective: To study the impacts of kidney transplantation on erectile function and analyse its contributing factors.
Methods: In order to evaluate the severity of erectile dysfunction (ED), a total of 250 married male kidney transplant recipients (KTR) with functioning graft were assessed with the International Index of Erectile Function (IIEF) questionnaire. Data of clinical characteristics, medical and sexual history and laboratory examination were collected. Univariate and multivariate logistic regression analyses were carried out to determine which have independent impacts on erectile function.
Results: The investigation was accomplished in 84.8% of the KTRs. There was no significant difference in ED incidence before and after renal transplantation (53.8% vs. 44.3%, P > 0.05). According to the IIEF score, erectile function improved in 43.9% of the KTRs, remained unchanged in 42.9%, and deteriorated in 13.2%, as compared with pre-transplantation. Logistic regression analysis showed that significant and independent influencing factors in erectile function were age, hemoglobin level, presence of DM and/or peripheral neuropathy and iterative transplantations, and their relative risks were 3.01, 2.01, 3.15, 3.89 and 2.67, respectively.
Conclusion: ED is highly prevalent among KTRs and its pathogenesis is multifactorial. Age, presence of DM and/or peripheral neuropathy, hemoglobin level and iterative transplantations were chief contributing factors in erectile function.
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