Tripterygium Glycosides Combined with Leflunomide for Rheumatoid Arthritis: A Systematic Review and Meta-Analysis

Table 2

Quality assessment of the eligible studies.

Studies (author, year)	Randomization	Allocation concealment	Blinding	Incomplete outcome data	Withdrawals and dropouts
Wan Shao-Fen 2009 [8]	Yes	NM	NM	No	NM
Zhang Rong and Le 2011 [9]	Yes, SS	NM	NM	No	NM
Min Jing and Gu 2012 [10]	Yes	NM	NM	No	NM
Long Hong 2014 [11]	Yes	NM	NM	No	NM
Zhao and Zhang 2014 [12]	Yes, SS	NM	NM	No	NM
Sun Fengyan 2016 [13]	Yes, SS	NM	NM	No	NM
Deng-Wen 2017 [14]	Yes, RNT	NM	NM	No	NM
Zhang 2017 [15]	Yes, RNT	NM	NM	No	NM
Feng Yan-Guang and Kun 2018 [16]	Yes	NM	NM	No	NM
Zhang 2018 [17]	Yes, RNT	NM	NM	No	NM
Yang 2019 [18]	Yes, RNT	NM	NM	No	NM
Sha and Yu 2019 [19]	Yes, RNT	NM	NM	No	NM

SS: stratified sampling, RNT: random number table, NM: not mentioned.