Table 4.
NOS quality assessment.
| Study ID | Newcastle-Ottawa Scale | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Selection | Comparability | Outcome | Overall score (out of 9) | ||||||
| Representativeness of the exposed cohort (score: ★) | Selection of the non-exposed cohort (score: ★) | Ascertainment of exposure (score: ★) | Demonstration that outcome of interest was not present at the start of the study (score: ★) | Comparability of cohorts on the basis of the design or analysis (score: ★★) | Assessment of outcome (score: ★) | Was follow-up long enough for outcomes to occur (maximum: ★) | Adequacy of follow-up of cohorts (maximum: ★) | ||
| Danne, 2021 | ★ | ★ | ★ | – | ★★ | ★ | ★ | ★ | 8 |
| Kucharska, 2021 | ★ | ★ | ★ | – | – | ★ | ★ | ★ | 6 |
| Lawrence, 2021 | ★ | ★ | ★ | – | – | ★ | ★ | ★ | 6 |
| Loh, 2021 | ★ | ★ | ★ | – | ★★ | ★ | ★ | ★ | 8 |