Evaluation of tumor response to antiangiogenic therapy in patients with recurrent gliomas using contrast-enhanced perfusion-weighted magnetic resonance imaging techniques: A meta-analysis

Table 1 Quality assessment of the included studies

Study	Risk of bias				Applicability concerns
	Patient selection	Index test	Reference standard	Flow and timing	Patient selection		Index test	Reference standard
Iwamoto et al[29], 2010	L	U	H	L	L	L		L
Piludu et al[30], 2015	L	U	U	L	L	L		L
Kalpathy-Cramer et al[31], 2017	L	U	U	L	L	L		L
O’Neill et al[32], 2016	L	U	H	L	L	L		L
Schmainda et al[4], 2014	L	U	U	L	L	L		L
Hilario et al[33], 2016	L	U	U	L	L	L		L

L: Low risk; U: Unclear risk; H: High risk.