Table 2.

Study quality assessment (QUADAS-2 tool)

Study	Risk of bias				Applicability concerns
	Patient selection	Index test	Reference standard	Flow and timing	Patient selection	Index test	Reference standard
Aceti14	High	High	Low	High	Low	Low	Low
Kafwabulula15	High	Low	Low	High	Low	Low	Low
Torrea16	High	Low	Low	High	Low	Low	Low
Cannas17	High	Unclear	Low	High	Low	Low	Low
Gopinath18	High	Unclear	High	High	Low	Low	High
Lawn19	High	High	High	High	Low	Low	Low
Peter9	Unclear	Low	Unclear	High	Low	Low	Low
Shenai10	Unclear	High	High	Unclear	Low	Low	Low

QUADAS =Quality Assessment Tool for Diagnostic Accuracy Studies.