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Quality assessment scores nonrandomized trials.
| Nonrandomized controlled trials | Selection | Comparability | Outcome | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Representative cohort | Selection of nonexposed cohort | Ascertainment of exposure | Not present at start | Control for most important factor | Control for additional factors | Assessment of outcome | Follow-up long enough | Adequacy of follow-up | |
| Kujawa et al. (2015) | |||||||||
| ∗ | ∗ | ∗ | ∗ | ∗ | ∗ | ||||
| Lachowicz et al. (2014) | |||||||||
| ∗ | ∗ | ∗ | ∗ | ||||||
