Table 2. | Newcastle-Ottawa scale for assessing quality of non-randomized studies [28], categorized as low-quality (0 - 3 stars), moderate quality (4 - 6 stars), and high quality (7 - 9 stars) |
| Study |
Year of publication |
Selection (maximum 4 stars) |
Comparability (maximum 2 stars) |
Outcome (maximum 3 stars) |
Total score/ quality |
|---|---|---|---|---|---|
| Kloss et al. [29] | 2018 | ☆ ★ ★ ★ | ★ ★ | ★ ★ ★ |
8 stars/ high quality |
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