Survival outcomes following complete mediastinal lymphadenectomy or selective mediastinal lymphadenectomy in patients with stage I-IIIA non-small cell lung cancer: protocol for a systematic review and meta-analysis.

"Competing interests: None declared."

"Funding: This study was supported by the Jiangxi Provincial Department of Education Science and Technology research project (GJJ218111); Jiangxi Province university humanities and social science research project (JY21240); Jiangxi Province key research and development programme (no. 2020YBBGWL001); and the Jiangxi Provincial Department of Education Science and Technology research key project (no. GJJ208902)."

"This systematic review protocol has been registered at the Open Science Framework (https://doi.org/10.17605/OSF.IO/PN7UQ). The protocol follows the guidelines recommended in Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols (PRISMA-P) (PRISMA-P checklist in ). The meta-analysis will be conducted in accordance with the standard methodology recommended by the Cochrane Collaboration and reported in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 guidance. Study registration: Open Science Framework (https://doi.org/10.17605/OSF.IO/PN7UQ)."