“…Other occasionally identified factors include diabetes, the use of penile skin grafts, surgical technique (anastomotic urethroplasty), hypospadias, poor oral hygiene and surgeon experience. 5,6 Some of the inconsistency can be explained by the fact that no studies have examined a comprehensive list of all known potential confounding variables, which increases the risk of underestimating or overestimating the association between a given variable and treatment outcome. Additionally, many studies are simply not statistically powered to examine all potential risk factors, and a significant association with more factors might have been found if studies had greater statistical power.…”