Table 3.

Risk of bias of included studies

Studies （Author/Year）	Random allocation	Allocation concealed	Baseline similarity	Subject blinding	Therapist blinding	Assessor blinding	Adequate follow‐up	Intention to treat	Between‐group comparison	Point estimate and variability
Kirkman/2014	√	√	√	×	×	√	√	√	√	√
Wu/2014	√	×	√	×	×	×	√	√	√	√
Oivera/2015	√	×	√	√	√	×	√	√	√	√
Song/2012	√	×	√	×	×	×	√	√	√	√
Cheema/2007	√	√	√	×	×	√	√	√	√	√
Stephaine/2016	√	√	√	√	√	√	√	√	√	√
Martin/2016	√	×	√	×	×	×	√	√	√	√
Chen/2010	√	√	√	×	×	×	√	×	√	√
Pellizzaw/2013	√	×	√	×	×	×	√	√	√	√
Liu/2017	√	×	√	×	×	×	√	√	√	√
Sun/2016	√	×	√	×	×	×	√	√	√	√
Segura/2009	√	×	√	×	×	×	√	√	√	√
Rosa C/2018	√	√	√	×	×	×	√	√	√	√
Kopple/2007	√	×	√	×	×	×	√	√	√	√

“×” indicated high risk; “√” indicated low risk.