Table 6. Risk of bias in randomized controlled studies.

Methodological quality criteria	25	27	24	29
Is randomization appropriately performed?	Yes	Yes	Yes	Yes
Are the groups comparable at baseline?	No	Yes	Yes	Yes
Are there complete outcome data?	Yes	Yes	Yes	Yes
Are outcome assessors blinded to the intervention provided?	No	Yes	No	No
Did the participants adhere to the assigned intervention?	Yes	Yes	Yes	Yes
Total score; % high quality	80	100	90	90