Table 3

Quality of included studies (Jadad score).

Author

Randomized

Appropriate randomization

Double blind

Appropriate blinding (single blind)

Drop outs appropriately declared

Score

Jost

Yes

Yes

No

Yes

Yes

4/5

Baker

Yes

Yes

No

Yes

Yes

4/5

Jacobs

Yes

Yes

No

Yes

Yes

4/5

Wik

Yes

Yes

No

Yes

Yes

4/5

Meier et al. BMC Medicine 2010 8:52   doi:10.1186/1741-7015-8-52