Are platelet and eosinophil parameters indicators of predicting the development of erectile dysfunction after radical prostatectomy?

INTRODUCTION: Erectile dysfunction(ED) may develop in 14-90% following radical prostatectomy(RP). Development of ED is due to neurovascular damage during surgery. In our study, we aimed to evaluate whether the platelet and eosinophil parameters are prognostic factors in predicting ED after prostatectomy. METHODS: Data of 181 patients who underwent RP between January 2010 and December 2016 were analyzed retrospectively. In the preoperative period, platelet count, mean platelet volume (MPV), platelet distribution width (PDW) and eosinophil count were recorded. The patients were evaluated for ED according to the International Erectile Function Index in preoperatively and postoperatively. In the postoperative 12th month, ED was observed in 128 patients following RP. Among them, 82 patients with postoperative ED were included in Group I, and 46 patients without postoperative ED were included in Group II. RESULTS: Age (p=0.281) and body mass index (p=0.851) had no significant difference between groups. In preoperative period, mean platelet count (292.18±51.62 vs. 240.15±46.25, p<0.001), mean MPV value (8.77±1.24 vs. 6.17±0.87, p<0.001) and mean eosinophil count (0.57±0.16 vs. 0.47±0.10, p<0.001) were higher Orijinal Çalışma 137 Adress for correspondence: İsmail Selvi, Karabük Üniversitesi Eğitim ve Araştırma Hastanesi, Üroloji Kliniği 78200 Merkez / Karabük – Türkiye e-mail: ismselvi33@hotmail.com Available at www.actaoncologicaturcica.com Copyright ©Ankara Onkoloji Hastanesi in Group I. Mean PDW value (16.21±1.84 vs.16.75±1.77, p=0.110) had no significantly difference. According to ROC analysis, the cut-off values for platelet, MPV and eosinophil were 242 (AUC: 0.783, p<0.001), 7.24 (AUC: 0.951, p<0.001) and 0.5 (AUC: 0.675, p=0.001), respectively. In multivariate analysis, MPV and eosinophil were found to be more important independent factors in predicting ED after RP. DISCUSSION and CONCLUSION: It is shown that platelet, MPV and eosinophil are independent predictive factors in predicting ED following prostatectomy.