Table 3.

Quality Assessment of the Included Studies

Reliability of Assessments	n	%
Acceptable reliability/ low risk of bias	7	87.5
Questionable reliability/ high risk of bias	0	0
Insufficient information/ unclear risk of bias	1	12.5
Data analysis
Appropriate analysis/ low risk of bias	8	100
Inappropriate analysis / high risk of bias	0	0
Reporting
Satisfactory reporting/ low risk of bias	8	100
Incomplete reporting/ high risk of bias	0	0

Notes: n, number of included studies; data analysis, it refers to the methods used appropriately for data analysis; reporting, it refers that the author were specific in their reporting about hypotheses and statistical findings.