Updates in breathomics behavior in ischemic heart disease and heart failure, mass-spectrometry

Table 2 The overall risk of bias in the selected studied based on the “risk of bias” method of assessment

Ref.	Selection bias	Performance bias	Detection bias	Attrition bias	Reporting bias	Other bias	Overall bias
Modak et al[27]	+	-	-	+	+	+	+
Tang et al[11]	-	-	-	-	-	-	-
Biagini et al[10]	+	-	+	+	-	+	+
Mollar et al[19]	+	-	-	-	+	+	+
Marcondes-Braga et al[17]	!	-	!	+	-	!	!
Bykova et al[12]	+	-	-	-	-	+	±
Yokokawa et al[20]	+	-	-	-	+	+	+
Biagini et al[13]	-	-	-	-	+	+	±
Marcondes-Braga et al[16]	+	+	-	+	-	!	+
Yokokawa et al[18]	-	-	+	-	+	-	±
Overall bias	+	-	±	±	±	+	+