Table 3.

Quality assessment of included randomized controlled trials on comparison between intravenous thrombolysis and control group.

Studies	Level of evidence	Random sequence generation	Allocation concealment	Blinding	Incomplete outcome data	Selective reporting	Other bias
Michel et al 2012[14]	I	Yes	Yes	Yes	No	Unclear	Unclear
Thomalla et al 2018[16]	I	Yes	Yes	Yes	Yes	Yes	Yes
Ma et al 2019[17]	I	Yes	No	No	Unclear	Unclear	Unclear
Ringleb et al 2019[18]	I	Yes	Yes	Yes	Yes	Yes	Unclear

Yes: (low risk of bias), No: (high risk of bias), Unclear:(unclear risk of bias).