Table 3.

Quality of the selected studies.

Authors	PRISMA quality of report	Risk of bias	AMSTAR-2 confidence level	Scale used to evaluate primary studies
Miron et al. [17]	18/27	Moderate	Low	Not reported
Miron et al. [18]	25/27	Low	Low	Cochrane risk-of-bias tool for randomized trials
Castro et al. [19]	23/27	Low	Low	Cochrane collaboration's tool for assessing the risk of bias
Panda et al. [20]	23/27	Low	Low	Cochrane
Zhou et al. [21]	23/27	Low	Low	Cochrane
Moraschini and Barboza [24]	27/27	Low	High	Cochrane collaboration's tool
Najeeb et al. [22]	18/27	Moderate	Low	Jadad scale
Tavelli et al. [23]	23/27	Low	High	Cochrane risk-of-bias tool for randomized trials