Abstract
The evidence examining the effects of regional blocks on complications posthypospadias repair has been controversial. Nine observational studies have been published thus far, with inconsistent and somewhat contradictory results. In this educational article, we attempt to explain the concepts of study accuracy and precision in the context of the hypospadias literature to shed some light on the reasons behind those controversies. Methodological issues such as selection bias, confounding effect, sample size, confidence interval and study generalizability from studies involving dorsal penile block versus caudal epidural anesthesia in hypospadias repair are discussed.
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