Table 4.

AMSTAR 2 critical appraisal tool ratings for critical domains and overall confidence for risk of bias in included systematic review studies

Citation	Protocol registered	Adequacy of the literature search	Justification for excluding individual studies	Risk of bias from individual studies	Appropriateness of meta-analytical methods	Consideration of risk of bias when interpreting the results	Assessment of presence and likely impact of publication bias	Rating overall confidence
Bachlete et al. [44]	Partial Yes	Partial Yes	Yes	Partial Yes	NA	Yes	NA	Moderate
Ballini et al., [46]	Yes	Yes	Yes	Yes	NA	Yes	NA	High
Damani et al., [45]	Partial Yes	Yes	Yes	Yes	NA	Yes	NA	Moderate