Mechanical thrombectomy (MT) for acute ischemic stroke (AIS) in COVID-19 pandemic: a systematic review

Table 1 Quality assessment and risk of bias by Hawker and colleagues

No.	First author, country	Abstract and title	Introduction and aim	Method and data	Sampling	Data analysis	Ethic and bias	Finding	Generalisability	Implication and usefulness
1.	Al Kasab S; North and South America, Europe [45]	Good	Good	Good	Good	Good	Good	Good	Good	Good
2.	Cox M, USA [46]	Good	Good	Fair	Fair	Fair	Good	Good	Good	Good
3.	Escalard E, France [47]	Good	Good	Good	Good	Fair	Good	Good	Good	Good
4.	Havenon A, USA [48]	Good	Good	Good	Good	Fair	Good	Good	Good	Good
5.	Kerleroux B, France [28]	Good	Good	Good	Good	Good	Good	Good	Good	Good
6.	Kwan J, UK [49]	Good	Good	Fair	Fair	Good	Good	Good	Good	Good
7.	Mansour OY, Egypt [50]	Good	Fair	Fair	Fair	Good	Fair	Good	Good	Good
8.	McConachie D, UK [51]	Good	Good	Good	Good	Good	Good	Good	Good	Good
9.	Pop R, France [52]	Good	Good	Good	Good	Good	Good	Good	Good	Good
10.	Tiedt, Germany [53]	Good	Good	Good	Good	Good	Good	Good	Good	Good
11.	Qureshi A I, USA [54]	Fair	Fair	Fair	Fair	Good	Fair	Fair	Fair	Fair
12.	Wang A, USA [19]	Good	Good	Fair	Fair	Good	Fair	Good	Good	Good
13.	Yaeger K A, USA [55]	Good	Good	Good	Fair	Good	Fair	Good	Good	Good
14.	Yang B, China [29]	Good	Good	Good	Good	Good	Good	Good	Good	Good
15.	Yeboah K, USA [56]	Fair	Fair	Fair	Fair	Good	Fair	Good	Good	Good