Table 2.
Jadad scoring items of each eligible study for meta-analysis
| Study | Was the study randomized? | Was the randomization method described and appropriate? | Was the study described as double-blind? | Was the method of blinding described and appropriate? | Was there a description of withdrawals and dropouts? | Jadad scores |
|---|---|---|---|---|---|---|
| Schnyder, 2002. | Yes | NA | Yes | Yes | Yes | 4 |
| Righetti, 2003. | Yes | Yes | No | No | Yes | 3 |
| Toole, 2004. | Yes | Yes | Yes | Yes | Yes | 5 |
| Wrone, 2004. | Yes | Yes | Yes | Yes | Yes | 5 |
| Liem, 2005. | Yes | Yes | No | No | Yes | 3 |
| Zoungas, 2006. | Yes | NA | Yes | Yes | Yes | 4 |
| Bonaa, 2006. | Yes | Yes | Yes | Yes | Yes | 5 |
| Lonn, 2006. | Yes | Yes | Yes | Yes | Yes | 5 |
| Righetti, 2006. | Yes | Yes | No | No | Yes | 3 |
| Jamison, 2007. | Yes | NA | Yes | Yes | Yes | 4 |
| Heijer, 2007 | Yes | Yes | Yes | NA | Yes | 4 |
| Albert, 2008. | Yes | Yes | Yes | Yes | Yes | 5 |
| Mann, 2008. | Yes | Yes | Yes | NA | Yes | 4 |
| Ebbing, 2008. | Yes | Yes | Yes | NA | Yes | 4 |
| Armitage, 2010. | Yes | Yes | Yes | Yes | Yes | 5 |