Benefit-risk appraisal of lip-split mandibular “swing” vs. transoral approaches to posterior oral/oropharyngeal carcinomas using number needed to treat, to harm, and likelihood to be helped or harmed

•LSMA provides better PO/OPC resection and fewer recurrences than TOA at 5-year follow-ups.•FSB results ~100% represent complete tumor resection, and thereby, merit routine use in PO/OPC surgery.•Adverse event appraisal of surgical approaches to PO/OPCs using UW-QoLv4 may not be appropriate.