Modified Chaihu Shugan Powder for Functional Dyspepsia: Meta-Analysis for Randomized Controlled Trial

Table 3

Assessment of risk of bias of included studies.

Study	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other biases
Gao, 2003 [27]	U	H	U	U	U	U	H
G. Liang and Y. Liang, 2005 [28]	U	H	U	U	U	U	H
Huang and Yuan, 2006 [29]	U	H	U	U	U	U	H
Hu and Zhang, 2007 [30]	U	H	U	U	U	U	H
Zhou, 2008 [31]	U	H	U	U	U	U	H
Zhu, 2008 [32]	U	H	U	U	U	U	H
Pei and Zhao, 2009 [33]	L	H	U	U	U	U	H
Tan et al., 2010 [34]	U	H	U	U	U	U	H
Gong, 2010 [35]	U	H	U	U	U	U	H
Li, 2010 [36]	U	H	U	U	U	U	H
Zhang, 2010 [37]	L	H	U	U	U	U	H
Zhang, 2011 [38]	U	H	U	U	U	U	H
Jin et al., 2012 [39]	U	H	U	U	U	U	H
Liu, 2005 [40]	U	H	U	U	U	U	H
Shen et al., 2005 [41]	U	H	U	U	U	U	H
Zhang and Liu, 2007 [42]	U	H	U	U	U	U	H
Liu et al., 2008 [43]	U	H	U	U	U	U	H
Feng and Liu 2008 [44]	U	H	U	U	U	U	H
Pei and Zhao, 2009 [33]	L	H	U	U	U	U	H
Qiu, 2010 [45]	U	H	U	U	U	U	H
Tian, 2010 [46]	U	H	U	U	U	U	H
Fan, 2010 [47]	U	H	U	U	U	U	H

L: low risk of bias; U: unclear; H: high risk of bias.