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NOS scores for study selection
| Study | NOS score |
|||
|---|---|---|---|---|
| Selection | Comparability | Outcome | Total | |
| Ayloor Seshadri et al. [21] (2013) | 3 | 2 | 1 | 6 |
| Beard et al. [22] (2020) | 3 | 2 | 3 | 8 |
| Dalton et al. [23] (2012) | 3 | 2 | 2 | 7 |
| Han et al. [24] (2021) | 3 | 2 | 3 | 8 |
| Lai et al. [25] (2016) | 3 | 2 | 1 | 6 |
| Lee et al. [26] (2015) | 3 | 2 | 1 | 6 |
| Lee et al. [27] (2021) | 3 | 2 | 2 | 7 |
| Li et al. [28] (2015) | 3 | 1 | 2 | 6 |
| Wang et al. [29] (2020) | 2 | 2 | 2 | 6 |
| Wang et al. [30] (2021) | 3 | 3 | 2 | 8 |
| Yeom et al. [31] (2019) | 2 | 3 | 2 | 7 |
NOS, Newcastle-Ottawa scale.
