Table 3.

Results of the quality assessment of randomized controlled trials by the JADAD scoring system

	Item 1	Item 2	Item 3	Item 4	Item 5	Overall	Quality
Dunne et al[17] 1999	1	-1	0	0	0	0	Low; 0
Altintas et al[18] 2004	1	-1	0	0	0	0	Low; 0
Hirdes et al[19] 2013	1	1	1	1	1	5	High; 5
Pereira-Lima et al[21] 2015	1	1	1	1	1	5	High ,5
Camargo et al[21] 2003	1	-1	1	-1	1	1	Low; 1
Rupp et al[21] 1995	1	-1	0	0	0	0	Low; 0

Item 1: Was the study described as randomized? (Yes = 1 point, No = 0 point); Item 2: Was the randomization scheme described and appropriate? (Yes = 1 point, No = -1 point); Item 3: Was the study described as double-blind? (Yes = 1 point, No = 0 point); Item 4: Was the method of double blinding appropriate? (Yes = 1 point, No = -1 point, if the answer of Item 3 was No, Item 4 is not calculable); Item 5: Was there a description of dropouts and withdrawals? (Yes = 1 point, No = 0 point). Low range of quality: 3 >, high range of quality: 2 <.