Table 2.
Results of the newcastle–ottawa scale (NOS) quality assessment
| Study | Selection | Comparability | Outcome | Total |
|---|---|---|---|---|
| Chan 2002 | **** | ** | *** | ********* |
| Lin 2004 | **** | ** | *** | ********* |
| Jiun 2012 | *** | ** | ** | ******* |
| Ahn 2014 | **** | ** | *** | ********* |
| Leung 2014 | *** | ** | *** | ******** |
| ZHAO 2015 | **** | ** | *** | ********* |
| Mydlarz 2015 | **** | ** | ** | ******* |
| Schröck 2017 | **** | ** | ** | ******* |
| Vos 2017 | **** | ** | *** | ******** |
| Chan 2018 | **** | ** | *** | ********* |
| Guo 2019 | *** | ** | *** | ******** |
| Burgener 2021 | *** | * | *** | ******* |
| Wilson 2021 | *** | ** | ** | ******* |
| Burcher 2021 | **** | ** | ** | ******** |
| Lv 2022 | *** | ** | *** | ******** |
| Cao 2022 | **** | ** | *** | ********* |
| Routman 2022 | **** | ** | ** | ******** |
| Kogo 2022 | **** | ** | *** | ********* |
| Honoré 2023 | **** | ** | *** | ******** |
| Economopoulou 2023 | *** | ** | *** | ******** |
| Adrian 2023 | **** | ** | *** | ********* |
| Hanna 2024 | **** | ** | *** | ********* |