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

Published:October 15, 2022DOI:
      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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        • Prateek
        • Debnath P.R.
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        • Mouravas V.
        • Filippopoulos A.
        • Sfoungaris D.
        Urethral plate grafting improves the results of tubularized incised plate urethroplasty in primary hypospadias.
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        • Eliçevik M.
        • Tireli G.
        • Sander S.
        Tubularized incised plate urethroplasty: 5 years' experience.
        Eur Urol. 2004; 46: 655-659
        • Shuzhu C.
        • Min W.
        • Yidong Liu
        • Weijing Ye
        Selecting the right method for hypospadias repair to achieve optimal results for the primary situation.
        Springer. 2016; 5: 1624-1629
        • Mishra A.
        Hypospadias surgery: a single centre study to compare different techniques with special emphasis on transverse prepucial onlay island flap urethroplasty.
        Int Surg J. 2020; 7: 2868-2874

      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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