Table 1.

Modified Downs and Black methodological quality assessment ¹.

Article	1	2	3	4	6	7	9	10	11	12	16	18	20	26	Total
Aloui et al. (2019) [26]	1	1	0	1	1	1	1	1	0	0	1	1	1	1	11
Baker, J.A (1992) [27]	1	1	0	1	1	1	0	0	U	U	1	1	1	U	8
Batalha et al. (2018) [28]	1	1	1	1	1	1	1	1	U	U	1	1	1	U	11
Bussey, H.I (2000) [29]	1	1	1	1	1	1	1	0	0	0	1	1	1	U	10
Behm, D.G. (1991) [6]	1	1	1	1	1	1	0	0	U	0	1	1	1	1	10
Cho et al. (2018) [30]	1	1	1	1	1	1	0	0	0	0	1	1	1	U	9
Escamilla et al. (2010) [31]	1	1	1	1	1	1	1	1	U	U	1	1	1	1	12
Fernandez et al. (2013) [32]	1	1	1	1	1	1	1	1	0	0	1	1	1	1	12
Gibson, T.S. (2002) [33]	1	1	1	1	1	0	1	1	0	0	1	1	1	U	10
Hibberd et al. (2010) [34]	1	1	1	1	1	1	0	1	0	0	1	1	1	U	10
Kim et al. (2018) [35]	1	1	0	1	1	1	0	0	U	U	1	1	U	1	8
Knerr, S.A (1995) [36]	1	1	0	1	1	1	1	0	0	0	1	U	1	1	9
Lima et al. (2018) [37]	1	1	1	1	1	1	0	0	U	U	1	1	1	1	10
Magnus et al. (2014) [38]	1	1	0	1	1	1	1	1	U	U	1	1	1	U	10
Markovic et al. (2016) [39]	1	1	0	1	1	1	1	0	U	U	1	1	1	1	10
Mascarin et al. (2017) [40]	1	1	1	1	1	1	1	1	0	0	1	1	1	U	11
Page et al. (1993) [17]	1	1	0	1	1	1	1	1	0	0	1	1	1	1	11
Picha et al. (2019) [41]	1	1	1	1	1	1	1	1	U	U	1	1	1	U	11
Pourtaghi et al. (2017) [42]	1	1	1	1	1	1	1	1	1	1	1	1	1	U	13
Richards, J.A. (2009) [43]	1	1	1	1	1	1	1	0	0	0	1	U	1	1	10
Sugimoto et al. (2006) [44]	1	1	1	1	1	1	1	0	U	U	1	1	1	1	11
Thiebaud et al. (2013) [45]	1	1	0	1	1	1	1	1	U	U	1	1	1	U	10
Treiber et al. (1998) [7]	1	1	0	1	1	1	0	0	0	0	1	1	1	1	9
Vaezi et al. (2015) [46]	1	1	0	1	1	0	1	0	U	U	1	1	0	U	7

¹ Scoring: 1 = yes, 0 = no, ‘U’ = unclear (equates to zero).