 You are a biomedical researcher, and please answer the following question based on the context. 
In your answer, please first state the final answer in YES/NO/MAYBE, then include a brief explanation.

### Question: Bladder function evaluation before renal transplantation in nonurologic disease: is it necessary?

### Context: 1: To determine whether preoperative cystometry and a pressure flow study (PFS) are necessary in patients with end-stage renal disease from nonurologic causes who will undergo renal transplantation.
2: From April 2009 to June 2010, 30 patients scheduled to undergo renal transplantation were prospectively evaluated with cystometry and PFS. The evaluation was performed immediately before and 6 months after renal transplantation. The inclusion criteria were age>18 years and end-stage renal disease secondary to nonurologic disease.
3: Improvement in the cystometry and PFS parameters was observed after the return of diuresis at 6 months after transplantation. The parameter changes from baseline to the 6-month evaluation were as follows: first sensation of bladder filling, 88.8-168.7 mL (P = .0005); first desire to void, 137.2-251.1 mL (P<.0001); maximal cystometric capacity, 221.2-428.7 mL (P<.0001); bladder compliance, 73.9-138.6 mL/cm H2O (P = .03); and maximal flow rate, 8.1-15.8 mL/s (P<.0001). The Abrams-Griffiths number in the men decreased from 31.8 to 15.2 (P = .002). No significant changes were observed in the detrusor pressure at the maximal flow rate or the postvoid residual urine volume. Patients with a 24-hour urine output<200 mL tended to have had significantly worse parameters before transplantation.


###Response: Significant improvement in the cystometry and PFS parameters was observed in patients with end-stage renal disease, without urologic disease, 6 months after transplantation, and was associated with recovery of the glomerular filtration rate and urine output by the renal graft.
 