Table 3. Quality Assessment of the Included Studies .

RCT, randomized clinical trial.

Study	Type	Quality Assessment Tool Used	Summary Appraisal-Quality Level
Bryant et al. 2012 [13]	Retrospective case-control	Newcastle Ottawa	High quality (low risk)
Briley et al. 2014 [14]	Prospective case-control	Newcastle Ottawa	High quality (low risk)
Chalouhi et al. 2015 [15]	Retrospective case-control	Newcastle Ottawa	High quality (low risk)
Harvey et al. 2017 [5]	Retrospective case-control	Newcastle Ottawa	High quality (low risk)
Kodan et al. 2020 [9]	Retrospective case-control	Newcastle Ottawa	Some concerns
Wetta et al. 2013 [16]	Secondary analysis of RCT	Cochrane risk of bias	High quality (low risk)
Reime et al. 2012 [17]	Retrospective cohort	Newcastle Ottawa	High quality (low risk)
Thepampan et al. 2021 [18]	Retrospective case-control	Newcastle Ottawa	Some concerns