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Response to letter to the editor re distal hypospadias repair: Comparative study between snodgrass and transverse preputial onlay flap

Published:October 15, 2022DOI:https://doi.org/10.1016/j.jpurol.2022.09.025
      Sample size was calculated using (G power version 3). Minimal sample size of patients was 30 in each group needed to get power level 0.80, alpha level 0.05. To overcome problem of loss of follow up, calculated sample size was increased by 10% to reach 33 in each group.
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      Linked Article

      • Snodgrass may not win a snodgrass look-alike contest!
        Journal of Pediatric Urology
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          I read with great interest the article by El-helaly et al. [1]. The authors aimed to prospectively compare 2 techniques for repair of distal hypospadias. They randomly allocated patients to either a “Snodgrass” tubularized incised plate repair (TIP) or a transverse preputial onlay flap (TPOF). The authors do not explain how they arrived at the number of 66 studied patients as the methods section does not describe a power calculation. If the study is underpowered, I wonder whether their findings can be used to independently support their conclusions.
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