Quality assessment of non-randomised studies included in meta-analyses
| Gordon et al26 | Jana et al11 | Schatz et al12 | Stenius-Aarniala et al13 | |
|---|---|---|---|---|
| Participant selection | 0 | 0 | 0 | 1 |
| Comparability between groups | 0 | 2 | 2 | 0 |
| Outcome definition | 1 | 1 | 1 | 1 |
| Outcome diagnosis | 0 | 2 | 2 | 2 |
| Sample size | 1 | 1 | 1 | 1 |
| Cohort design | 1 | 2 | 2 | 1 |
| Total score | 3 | 8 | 8 | 6 |