Table 3 Assessment of methodological quality of the meta-analyses regarding non-critical domains of the AMSTAR-2 checklist.

Meta-Analysis ID	PICO	Design	Screening	Extraction	Inclusion	Funding	Impact of RoB	Heterogeneity	Publication bias	Conflict of interest
Jiang [30]	yes	no	yes	yes	partial yes	no	yes	yes	no	yes
vanOosterhout [28]	yes	no	no	no	no	no	yes	yes	yes	yes
EichnerBerna [22]	yes	no	no	yes	no	no	yes	yes	yes	yes
Liu [23]	yes	no	yes	yes	partial yes	no	no	no	yes	no
Philipp [24]	yes	no	yes	yes	partial yes	no	yes	yes	yes	yes
Sauvé [25]	yes	no	yes	yes	partial yes	no	yes	yes	yes	yes
Penney [26]	yes	yes	yes	yes	partial yes	no	yes	yes	yes	yes

AMSTAR-2 a measurement tool to assess systematic reviews (Shea et al. [35]), PICO population, intervention, comparator group, outcome, RoB risk of bias.

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