Table 1.

Quality criteria of included studies according to QUADAS-2 assessment tool.

Study	Risk of bias				Applicability concerns
	Patient selection	Index test	Reference standard	Flow and timing	Patient selection	Index test	Reference standard
Bayir 201617	High risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Pang 201618	Low risk	Low risk	Low risk	High risk	Low risk	Low risk	Low risk
Selcuk 201719	High risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Marzetti 201320	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Ugur 201421	High risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Pang 20097	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Pang 20078	High risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Wassmuth 200022	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk