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. 2016 Jun 7;42:57. doi: 10.1186/s13052-016-0268-1

Table 2.

Quality assessment of the included articles

Studies	QUADAS list item
Studies	1	2	3	4	5	6	7	8	9	10	11	12	13	14
Bhandari, 2008 [7]	+	0	+	+	+	+	+	+	0	0	+	+	0	+
Choo, 2012 [20]	+	-	+	+	+	+	+	+	0	0	+	+	-	+
Dilli, 2010 [21]	+	+	+	+	+	+	+	+	+	0	+	0	+	+
Du, 2014 [11]	+	+	+	+	+	+	+	+	-	+	+	+	0	+
Elawady, 2014 [12]	+	+	+	+	+	+	+	+	+	0	+	0	+	+
Genel, 2012 [22]	+	+	+	+	+	+	+	+	0	0	+	0	+	+
Groselj-Grenc, 2009 [23]	+	0	+	+	+	+	+	+	+	0	+	+	+	+
Lam, 2011 [24]	+	0	+	+	+	+	+	+	+	+	+	+	0	+
Layseca-Espinosa, 2002 [8]	+	0	+	+	+	+	+	-	+	0	+	0	0	+
Motta, 2014 [25]	+	-	+	+	+	+	+	+	+	0	+	0	+	+
Ng, 2002 [9]	-	+	+	+	+	+	+	+	0	0	+	0	+	+
Ng, 2004 [26]	+	+	+	+	+	+	+	+	+	0	+	+	+	+
Ng, 2006 [27]	+	+	+	+	+	+	+	+	+	0	+	+	+	+
Soni, 2013 [28]	+	0	+	+	+	+	+	+	+	0	+	+	+	+
Streimish, 2012 [19]	+	0	+	+	+	+	+	+	0	0	+	+	0	+
Streimish, 2014 [29]	+	0	+	+	+	+	+	+	0	0	+	+	0	+
Zeitoun, 2010 [30]	+	+	+	+	+	+	+	+	0	0	+	0	0	+

Abbreviation: QUADAS Quality Assessment of Diagnostic Accuracy Studies. +: YES; -: NO; 0: not clear