TABLE 2.
Study designs and quality scoring using Newcastle‐Ottawa Scale for non‐randomized studies in meta‐analyses and classification according to AHRQ standards
| Study | Design | Bias Rating Newcastle Ottawa | AHRQ | ||
|---|---|---|---|---|---|
| Selection | Comparability | Outcome/exposure | |||
| Amalakanti. et al. 2021 | Case control | ** | * | * | Poor |
| Manera et al. 2021 | Case control | *** | * | ** | Good |
| Ortelli et al. 2021 | Case control | *** | ** | ** | Good |
| Raman et al. 2021 | Case control | **** | ** | ** | Good |
| Triana. et al. 2020 | Case control | *** | ** | * | Poor |
| Woo, M.S. et al. 2020 | Case control | *** | * | *** | Good |
| Zhou, H. T., et al. 2020 | Case control | *** | ** | *** | Good |
| Alemanno, F., et al. 2021 | Cohort | * | * | ** | Poor |
| Almeria et al. 2020 | Cohort | ** | * | ** | Fair |
| Becker et al. 2021 | Cohort | ** | ‐ | * | Poor |
| Crivelli et al. 2021 | Cohort | **** | ** | ** | Good |
| Dressing et al. 2021 | Cohort | ** | ‐ | ** | Poor |
| Del Brutto et al. 2021 | Cohort | **** | * | *** | Good |
| Ermis et al. 2021 | Cohort | ** | ‐ | ** | Poor |
| Mattioli et al. 2021 | Cohort | ** | ‐ | ** | Poor |
| Méndez et al. 2021 | Cohort | ** | ‐ | ** | Poor |
| Miskowiak et al. 2021 | Cohort | *** | ** | *** | Good |
| Hellgren et al. 2021 | Cohort | *** | ‐ | ** | Poor |
| Hosp et al. 2021 | Cohort | *** | ** | ** | Good |
| Vannorsdall et al. 2021 | Cohort | **** | ‐ | * | Poor |
| Yesilkaya et al. 2021 | Case report | ||||
| Tolentino, J. C., et al. 2021 | Case report | ||||
| Beaud et al. 2020 | Case series | ||||
| Groiss, S. J., et al. 2020 | Case series | ||||
| Hellmuth et al. 2021 | Case series | ||||
| Negrini et al. 2021 | Case series | ||||
| Whiteside, D. M., et al. 2021 | Case series | ||||