Table 2.

Quality assessment of reviewed studies.

Study	EC	RA	CA	SAB	SB	TB	AB	DR	ITA	BC	PM	OSQ
Tao et al., 2017	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	High
Tao et al., 2016	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	High
Field et al., 2010	No	CD	CD	CD	No	Yes	CD	Yes	Yes	NA	No	Low
Wei et al., 2013	Yes	No	No	NA	Yes	NA	Yes	Yes	NA	Yes	Yes	Moderate
Wei et al., 2014	Yes	No	No	NA	Yes	NA	Yes	Yes	NA	Yes	Yes	Moderate
Fong et al., 2014	Yes	No	No	NA	Yes	NA	Yes	Yes	NA	Yes	Yes	Moderate
Li et al., 2014	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	High
Yin et al., 2014	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	High
Zheng et al., 2015	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	High
Hawkes et al., 2014	Yes	No	No	NA	Yes	NA	Yes	Yes	NA	Yes	Yes	Moderate
Liu et al., 2003	Yes	No	No	NA	Yes	NA	Yes	Yes	NA	Yes	Yes	Moderate

EC, eligibility criteria; RA, random allocation; CA, concealed allocation; SAB, similar at baseline; SB, subject blinded; TB, therapist blinded; AB, assessor blinded; DR, drop-out rate; ITA, intention-to-treat analysis; BC, between-group comparison; PM, points measures; OSQ, overall study quality; CD, cannot determine; NA, not applicable.