“…Previous studies have identified increasing patient age as a significant risk factor for the onset of POUR [ 12 , 14 , 15 , [22] , [23] , [24] ], and male sex is equally well-described as a predisposing factor [ 12 , 14 , 15 , 25 ]. Other commonly identified risk factors include administration of high volumes of fluid intraoperatively and postoperatively [ [12] , [13] , [14] , 23 , 26 ], previous history of urologic disease such as benign prostatic hyperplasia or weak urinary stream [ [13] , [14] , [15] , [24] , [25] , [26] , [27] , [28] , [29] ], intraoperative catheter placement [ 23 ], the use of opioid analgesics during or after surgery (especially patient-controlled analgesia) [ 12 , 14 , 25 , 30 , 31 ], spinal or epidural anesthesia [ [11] , [12] , [13] , [14] ], poor ASA grade [ 14 ], and other medical comorbidities such as diabetes, renal disease, or even psychiatric disease [ 14 , 15 ]. Most of these factors are consistent with what is expected physiologically.…”