Validation of initial serum creatinine as a predictive factor for development of end stage renal disease in posterior urethral valves.
OBJECTIVE
The aim of this study was to determine the value of initial serum creatinine in prediction of End-stage renal disease (ESRD) in children with posterior urethral valves PUV.


METHODS
In this retrospective study, patients diagnosed with PUV admitted in Aliasghar Children's Hospital in Tehran, Iran from 1991 through 2001 were studied. Based on the development of ESRD (need for dialysis) they were classified in two groups and their demographics, initial presentations, laboratory data, imaging findings and outcomes were reviewed and compared.


RESULTS
Thirty six male patients with PUV, treated with valve ablation (13), vesicostomy (13), or high ureterostomy (10) were followed for developing ESRD. Sixteen of the 36 patients developed ESRD at their last follow-up. There was no significant difference in age at initial presentation, presence of urinary tract infections, incidence of vesicoureteral reflux, renal dysplasia or type of primary surgical intervention between the patients with or without ESRD. Patients who progressed to ESRD had serum creatinine concentration > 1.0 mg/dl at diagnosis as compared to those without ESRD (P = 0.001).


CONCLUSION
Initial serum creatinine is a valuable factor for prediction of renal outcome in patients with PUV.