Table 4.

Quality assessment scoring for all human studies included in quantitative data synthesis and analysis, based on the criteria set out in the Cochran Handbook

		Randomisation	Allocation concealment	Blinding	Blinding-outcome	Incomplete data	Selective reporting	Funding	Overall
Barona et al.	2012	0	0	0	0	1	1	0	2
Bhatt et al.	2012	1	−1	−1	−1	1	1	1	1
Bo et al.	2016	1	1	1	1	1	1	1	7
Bo et al.	2013	1	1	1	1	1	1	0	6
Botden et al.	2012	1	1	1	1	1	1	1	7
Draijer et al.	2015	0	0	1	1	1	1	1	5
Evans et al.	2017	1	1	1	1	1	1	1	7
Faghihzadeh et al.	2015	1	1	1	1	1	1	1	7
Fodor et al.	2018	0	1	0	0	0	1	0	2
Fujitaka et al.	2011	0	0	−1	−1	0	1	1	0
Heeboll et al.	2016	0	0	0	0	1	1	1	3
Imamura et al.	2017	0	0	1	1	1	1	1	5
Khodabandehloo et al.	2018	1	1	1	1	1	1	1	7
Kjaer et al.	2017	1	1	1	1	1	1	1	7
Lekakis et al.	2005	0	0	0	0	0	1	0	1
Marques et al.	2018	0	0	0	0	0	1	1	2
Mellen et al.	2010	0	0	1	1	0	1	1	4
Movahed et al.	2013	1	1	1	1	1	1	1	7
Perez-Jiminex et al.	2008	0	0	0	0	0	1	1	2
Ras et al.	2013	0	0	1	1	1	1	1	5
Riche et al.	2014	1	1	1	1	1	1	1	7
Seyyedebrahimi et al.	2018	1	1	1	1	1	1	1	7
Sano et al.	2007	1	1	0	0	1	1	0	4
Sivaprakasapillai et al.	2009	0	0	0	0	0	1	1	2
Timmers et al.	2016	1	1	0	0	0	1	1	4
Timmers et al.	2011	0	0	0	0	0	1	1	2
Tome-Carneiro et al.	2013	0	0	0	0	0	1	1	2
van der Made et al.	2017	0	0	0	0	0	1	1	2
van Mierlo et al.	2010	0	0	1	1	1	1	1	5
Wightman et al.	2014	1	1	1	1	0	1	1	6
Wong et al.	2011	1	1	1	1	0	1	1	6
Wong et al.	2016	1	1	1	1	0	1	1	6
Wong et al.	2013	1	1	1	1	1	1	1	7
Xue et al.	2016	1	1	0	0	0	1	1	4
Yoshino et al.	2012	1	1	0	0	1	1	1	5