Table 1.

Results of the Quality Assessment of Selected RCTs Studies.

Authors (ref)	Participant randomization	Allocation concealment	Participant similarity	Participant blinding	Delivering treatment blinding	Outcome assessors blinding	Identical treatment	Follow up complete	Analyzed in randomized groups	Outcome measured in the same way	Outcome measured in a reliable way	Appropriate statistical analysis	Trial design appropriate
Au et al.(25)	Yes	Yes	Yes	Unclear	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Chan et al.(26)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Engelhardt et al.(27)	Yes	Yes	Yes	No	No	No	Yes	No	Yes	Yes	Yes	Yes	Yes
Jones et al.(28)	Yes	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Sampson et al.(29)	Yes	Unclear	Yes	Unclear	Yes	Unclear	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Schwartz et al.(30)	Yes	Unclear	Yes	Unclear	Yes	Unclear	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Song et al.(31)	Yes	Unclear	Yes	Unclear	Yes	Unclear	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Song et al.(32)	Yes	Unclear	Yes	Unclear	Yes	Unclear	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Song et al.(33)	Yes	Unclear	Yes	Unclear	Yes	Unclear	Yes	Yes	Yes	Yes	Yes	Yes	Yes

RCTs: randomized controlled trials.