Table 2.

Study Quality of the Diagnostic Studies Judged by the QUADAS II Checklist

Author	Year	Risk of Bias				Concerns Regarding Applicability			Total Stars
		Patient Selection	Index Test	Reference Standard	Flow and Timing	Patient Selection	Index Test	Reference Standard
Liu23	2019	Low	Low	Low	Unclear	Low	Low	Low	6
Wu27	2018	Low	Low	Low	Unclear	Low	Low	Low	6
Wang.J28	2018	Low	Low	Low	Unclear	High	Low	Low	5
Li29	2018	Low	High	Low	Unclear	Unclear	Low	Low	4
Yazarlou24	2018	Unclear	Unclear	Low	Low	Unclear	Low	Low	4
Huang30	2018	Low	Low	Low	Low	Unclear	Low	Low	6
Zhan31	2018	Low	Low	Low	Unclear	Unclear	Low	Low	5
Wang.W32	2018	Low	Unclear	Low	Unclear	Low	Low	Low	5
He33	2017	Low	Unclear	Low	Low	Unclear	Low	Low	5
Huo34	2017	Unclear	Low	Low	Unclear	Unclear	Low	Low	4
Zidan35	2017	Unclear	Low	Low	Unclear	Unclear	Low	Low	4
Han36	2016	Low	High	Low	Unclear	Unclear	Low	Low	4
Wen37	2016	Low	Low	Low	Unclear	Low	Low	Low	6
Duan38	2016	Low	Unclear	Low	Unclear	Unclear	Low	Low	4
Peng39	2016	Low	Low	Low	Low	High	Low	Low	6
Ren40	2013	Low	Low	Low	Low	Unclear	Low	Low	6
Weber41	2013	Unclear	Low	Low	Low	Low	Low	Low	6