Table 2.

A methodological quality score of the included studies. Part A is scored on the study’s design, follow-up, and number of participants. Part B refers to the outcome measures. The total score is a summation of parts A and B.

Study	Part A scores								Part B scores				Part A and B scores
	1	2	3	4	5	6	7	Total	1	2	3	Total
Asif et al. (29)	10	0	10	0	5	5	5	35	8	8	10	26	61
Bass et al. (30)	0	2	10	10	5	5	5	37	10	3	5	18	55
Chan et al. (31)	0	0	10	10	5	5	5	35	10	3	5	18	53
Chien et al. (16)	7	0	10	0	5	5	5	32	8	8	5	21	53
Dalat et al. (32)	10	2	10	10	5	5	5	47	10	8	5	23	70
Doty et al. (33)	0	2	10	10	5	5	5	37	10	8	5	23	60
Dureja et al. (34)	0	0	10	0	5	5	5	25	10	8	5	23	48
Füssenich et al. (18)	10	2	10	10	5	5	5	47	10	3	5	18	65
Gould et al. (9)	0	2	10	10	5	5	5	37	10	8	5	23	60
Hoveidaei et al. (35)	0	0	10	0	5	5	0	20	10	8	5	23	43
Korim & Allen (12)	7	0	10	0	5	5	5	32	10	3	5	18	50
Lee et al. (36)	4	0	10	0	5	5	5	29	10	3	5	18	47
Maleki et al. (37)	10	2	10	0	5	5	5	37	10	8	5	23	60
Riediger et al. (38)	10	5	10	0	5	5	5	40	10	3	5	18	58
Rippstein et al. (39)	0	2	10	0	5	5	5	27	10	3	5	18	45
Sarikaya et al. (40)	0	5	10	0	5	5	5	30	6	8	5	19	49