A Comparative Study on the Uroflowmetry Parameters between Single-stage and Staged Hypospadias Repair

Uroflowmetry documents functional outcome after hypospadias surgery. We aim to compare the uroflowmetry parameters between single-stage and staged hypospadias repair and determine any statistical difference.

This was a prospective cohort study conducted from July 2022 to July 2024. We compared the uroflowmetry parameters between single-stage and staged hypospadias repair on postoperative Day 10, Day 30, and Day 60. Quantitative variables were described as mean ± standard deviation and median with range and assessed using a paired t-test. Qualitative data were assessed using the Chi-square test or Fisher's exact test. A P < 0.05 was taken as statistical significance.

An Increase in mean flow rate and total voided volume was noted in both groups. The max flow rate was noted to decrease with time in both groups from day 10 to Day 60. Max flow rate increased with time in the single-stage repair and decreased with time in the staged repair group, but the values of max flow rate were statistically significant only for Day 60 with P = 0.08 (<0.05).

Uroflowmetry is a good tool to assess the functional outcome after hypospadias surgery. There was a statistically significant difference only in maximum flow rate (Qmax) between single-stage and staged repair groups on Day 60, indicating urinary outflow obstruction in the staged repair group in our study.