“…However, the type of primary treatment differed: Besides primary surgery (tumour resection), a (selective/functional) neck dissection was performed in some studies(Agarwal et al, 2014;Bekiroglu et al, 2011;Devine et al, 2001;Fang et al, 2013;Fang et al, 2014;Ochoa et al, 2021;Sakthivel et al, 2017;Seferin et al, 2022;Wu et al, 2020;Yang et al, 2014;Yue et al, 2018). Most surgical treatments included reconstruction(Devine et al, 2001;Fang et al, 2014;Ghai et al, 2021;Gu et al, 2021;Hoene et al, 2021;Larson et al, 2021;Li et al, 2013;Rogers et al, 2004;Rogers & Lowe, 2020;Sakthivel et al, 2017;Soares et al, 2018;Vora et al, 2017;Wu et al, 2020;Yang et al, 2014;Yuan et al, 2016;Yue et al, 2018;Zhang et al, 2013;Zhang et al, 2020). Only two studies did not apply or mention adjuvant therapy(Ochoa et al, 2021;Yang et al, 2014).One study did not report any treatment details(Vakil et al, 2012).As stated in the inclusion criteria, HR-QoL outcomes were assessed in all studies by using the UW-QoL questionnaire.…”