A network meta-analysis protocol of efficacy and safety evaluation of different surgery regimens for varicocele patients with infertility: A study protocol.

BACKGROUND Surgical treatment of varicocele is still one of the most common important treatments for male infertility. Surgery regimens for varicocele (VC) is various, including high ligation, sub-inguinal, inguinal, retroperitoneal, laparoscopic, and microsurgery. The surgery regimens applied for VC patients are various in clinic, however, the significance, advantages, and disadvantages of different varicocelectomies for male infertility are still in controversial. Therefore, this network meta-analysis is mainly to assess the relative efficacy and safety of different surgery regimens for VC patients with infertility. METHODS To compare the relative efficacy and safety among different varicocelectomies for VC patients, we systematic searched randomized controlled trials (RCTs) and non-RCTs were in five electronic databases: Pubmed, Web of Science, EMBASE database, Clinical Trials, and Cochrane Library. Using R-3.4.1 software to process and analyze data. The bias risk of RCTs and non-RCTs will be evaluated through the tool of Cochrane Handbook version 5.1.0 and non-randomized studies of interventions (ROBINS-I), respectively. RESULTS AND CONCLUSION The result of this network meta-analysis aim is to evaluate the relative effectiveness and safety and rank the interventions among all surgery methods for VC patients and provide more evidence-based guidance in clinical practice. PROTOCOL REGISTRATION NUMBER CRD42020162051.