Table 2.
Methodological Quality Assessment, per Pedro Scale
| Study | Criteria Met | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Verhagen et al. (2005)30 | 5 | Y | N | Y | N | N | N | Y | Y | N | Y |
| McGuine et al (2006)29 | 5 | Y | N | Y | N | N | U | Y | U | Y | Y |
| Emery et al. (2007)31 | 7 | Y | N | Y | N | Y | Y | Y | N | Y | Y |
| Hupperets et al. (2009)32 | 8 | Y | U | Y | N | Y | Y | Y | Y | Y | Y |
| Eils et al (2010)33 |
5 | Y | U | N | U | U | Y | U | Y | Y | Y |
| McGuine et al. (2011)34 | 6 | Y | N | Y | N | N | N | Y | Y | Y | Y |
| McGuine et al. (2012)35 | 6 | Y | N | Y | N | N | N | Y | Y | Y | Y |
| Mohammadi (2007)26 | 6 | Y | U | Y | U | N | U | Y | Y | Y | Y |
Maximum score: 10 points.
1. Randomization of groups 2. Concealed allocation 3. Similar group values/demographics at baseline 4. Subjects were blinded 5. Assessors were blinded 6. Blinding of assessors measuring outcome 7. Acceptable dropout rate 8. Intention to treat 9. Appropriate statistics 10. Point measure/measure of variability recorded. Y: Yes N: No U: Unknown