TABLE 2.
Newcastle-Ottawa scores of included studies (Note: A star system was used for allow a semi quantitative assessment of study quality. A study was awarded a maximum of four stars for the selection and three stars for exposure/outcome categories. A maximum of two stars were awarded for comparability).
| Lead author, year | Selection | Comparability | Exposure/Outcome | Reference |
|---|---|---|---|---|
| Dercle L, 2016 | **** | ** | *** | Dercle et al. (2016) |
| Bigot F, 2017 | **** | ** | *** | Bigot et al. (2017) |
| Svaton M, 2018 | **** | ** | ** | Svaton et al. (2018) |
| Mezquita L, 2018 | **** | ** | *** | Mezquita et al. (2018) |
| Ichiki Y, 2019 | *** | * | ** | Ichiki et al. (2019) |
| Lee CS, 2020 | *** | * | ** | Lee et al. (2020) |
| Swami U, 2020 | **** | ** | *** | Swami et al. (2020) |
| Jiang M, 2020 | *** | ** | *** | Jiang et al. (2020) |
| Takada K, 2020 | **** | * | *** | Takada et al. (2020) |
| Cantini L, 2020 | **** | * | ** | Cantini et al. (2020) |
| Kitadai R, 2020 | **** | ** | *** | Kitadai et al. (2020) |
| Formica V, 2020 | *** | * | *** | Formica et al. (2020) |
| NG YYK, 2020 | **** | * | *** | Ng et al. (2021) |
| Awada G, 2021 | **** | ** | *** | Awada et al. (2021) |
| Brown JT, 2021 | *** | ** | *** | Brown et al. (2021) |
| Ke L, 2021 | **** | ** | *** | Ke et al. (2021) |
| Sato S, 2021 | **** | ** | ** | Sato et al. (2021) |
| Ruiz-Banobre J, 2021 | **** | ** | *** | Ruiz-Bañobre et al. (2021) |
| Stares M, 2021 | **** | * | *** | Stares et al. (2021) |
| Khaki AR, 2021 | **** | ** | *** | Khaki et al. (2021) |
| Tokuyama N, 2021 | *** | * | *** | Tokuyama et al. (2021) |
| Pu D, 2021 | **** | ** | *** | Pu et al. (2021) |
| Onn A, 2021 | **** | ** | *** | Onn et al. (2021) |
| Morimoto K, 2021 | **** | * | *** | Morimoto et al. (2021) |
| de Kouchkovsky I, 2021 | **** | ** | *** | de Kouchkovsky et al. (2021) |
| Zhang Z, 2022 | **** | ** | *** | Zhang et al. (2022) |
| Scheider MA, 2022 | **** | ** | *** | Schneider et al. (2022) |
| Assie JB, 2022 | **** | * | *** | Assié et al. (2022) |
| Chen L, 2022 | **** | ** | *** | Chen et al. (2022) |
| Kim JH, 2022 | *** | * | *** | Kim et al. (2022) |
| Li Y, 2022 | **** | ** | *** | Li et al. (2022) |
| Yoo SK, 2022 | **** | ** | *** | Yoo et al. (2022) |
| Guo Y, 2022 | **** | ** | *** | Guo et al. (2022) |
| Abuhelwa AY, 2022 | **** | ** | *** | Abuhelwa et al. (2022) |
| Wu Y, 2022 | **** | ** | ** | Wu et al. (2022) |
| Stares M, 2022 | **** | ** | *** | Stares et al. (2022) |