Table 2.

Reporting quality of key methodological items ( n  = 98)

Item	Criteria	Description	No. of positive trials	%	Cohen’s к coefficient	95% CI
9	Allocation concealment	Description of the method used to implement the random allocation sequence assuring the concealment until interventions are assigned	1	1	1.00	-
11	Blinding	Whether or not participants, those administering the interventions or those assessing the outcomes were blinded to group assignment	1	1	0.68	0.50 to 0.96
16	Intention-to-treat analysis	No. of participants in each group included in each analysis and whether it was done by “intention to treat”	69	70	0.72	0.45 to 0.98