Table 3.

Quality assessment according to Jadad score

Reference	Was similarity between the two (or more) groups at baseline?	Was the trial described as randomized?	Was the randomization procedure described and appropriate?	Was the treatment allocation concealed?	Was the trial described as double‐blind?	Was the method of double blinding described and appropriate?	Was the number of withdrawals/dropouts in each group mentioned?	Was an analysis conducted on the intention to treat sample?	Jadad score
Akhondzadeh et al. 27	Yes	Yes	No	No	Yes	No	Yes	Yes	5
Tildesley et al. 4	Yes	Yes	No	No	Yes	No	Yes	No	3
Perry et al. 8	Yes	No	No	No	No	No	Yes	Yes	3
Tildesley et al. 18	Yes	Yes	No	No	Yes	No	No	No	3
Kennedy et al. 24	Yes	Yes	Yes	No	Yes	No	No	N/A	3
Scholey et al. 9	Yes	Yes	Yes	No	Yes	No	No	No	4
Moss et al. 26	Yes	Yes	No	No	No	No	No	No	2
Kennedy et al. 25	Yes	Yes	No	Yes	Yes	Yes	No	No	5