Table 2.

Quality assessment.

Studies	Random Sequence Generation	Allocation Concealment	Selective Reporting	Other Sources of Bias	Blinding (Participants and Personnel)	Blinding (Outcome Assessment)	Incomplete Outcome Data	Overall
Aarsand et al., 1998	L	H	H	H	L	H	H	Fair
Doshi et al., 2001	L	H	H	H	H	H	L	Fair
Doshi et al., 2002	L	H	H	H	H	H	L	Fair
Kilicdag Doshi et al., 2005	L	H	H	H	H	H	L	Fair
Mangoni et al., 2005	L	H	H	H	L	H	H	Fair
Sheu et al., 2005	L	H	H	H	L	H	L	Good
Villa et al., 2005	L	H	H	H	H	H	L	Fair
Moat et al., 2006	L	H	H	H	L	H	L	Good
Solini et al., 2006	L	H	H	H	H	H	L	Fair
Title et al., 2006	L	H	H	H	L	H	L	Good
Moens et al., 2007	L	H	H	H	L	H	L	Good
Mao et al., 2008	L	H	H	H	L	H	L	Good
Cagnacci et al., 2009	L	H	H	H	L	H	L	Good
Palomba et al., 2010	L	H	H	H	L	H	L	Good
Gargari et al., 2011	L	H	L	H	L	H	L	Good
khiavi et al., 2011	L	H	L	H	L	H	L	Good
Grigoletti et al., 2013	L	H	H	H	L	H	L	Good
Asemi et al., 2014	L	H	H	H	L	H	L	Good
Asemi et al., 2016	L	H	H	H	L	H	L	Good
Hashemi et al., 2016	L	L	H	H	L	L	L	Good
Qin et al., 2016	L	H	H	H	L	H	L	Good
Talari et al., 2016	L	H	H	H	L	H	L	Good
Bahmani et al., 2018	L	H	H	H	L	H	L	Good

Abbreviations: L, low; H, high.