Effect of dl-3-n-butylphthalide on infarction volume in animal models of ischemic stroke: A meta-analysis

Table 2 Risk of bias of the included studies

Study (yr)	A	B	C	D	E	F	G	H	I	J	Score
Qin et al[8], 2018	√	√	√				√	√	√	√	7
Zhao et al[16], 2018	√	√	√						√	√	5
Wang et al[18], 2018	√		√	√				√	√		5
Yan et al[17], 2017	√			√					√	√	4
Zhang et al[19], 2016	√			√					√	√	4
Zhao et al[16], 2018	√	√	√						√	√	5
Yin et al[20], 2016	√	√	√					√	√	√	6
Hua et al[21], 2015	√	√	√	√				√	√	√	7
Lu et al[22], 2014	√	√	√	√				√	√	√	7
Wang et al[23], 2013	√	√	√						√	√	5
Wang et al[24], 2013	√	√	√					√		√	5
Pan et al[25], 2013	√	√	√					√		√	5
Zhang et al[26], 2013	√	√	√						√	√	5
Wang et al[27], 2012	√	√	√						√	√	5
Wu et al[28], 2012	√	√	√						√	√	5
Zhang et al[29], 2012	√	√	√	√				√	√		6
Zhao et al[30], 2012	√	√	√	√				√	√	√	7
Li et al[31], 2010	√								√	√	3
Cao et al[32], 2009	√	√	√	√			√	√		√	7
Li et al[33], 2008	√	√	√	√				√		√	6
Zhang et al[34], 2006	√	√	√	√					√	√	6
Lin et al[35], 1996	√								√	√	3

A: Baseline characteristics; B: Allocation concealment; C: Sequence generation; D: Random housing; E: Blind feeding; F: Random outcome assessment; G: Result evaluator blind; H: No incomplete outcome data; I: No selective outcome reporting; J: No other sources of bias.