Table 2 Risk of bias assessment of studies included in the in the systematic review
Meta-data | Methodology | Newcastle-Ottawa Scale | |||||
|---|---|---|---|---|---|---|---|
Author | Publication Date | Origin | Study design* | Selection | Comparability | Exposure | Quality |
Gómez Peña et al [15] | 2015 | Spain | +− | **** | * | *** | 8 |
Beauclair et al [16] | 2007 | France | +− | **** | * | *** | 8 |
Lemieux et al [17] | 2013 | Canada | – | **** | ** | *** | 9 |
Roca L et al [2] | 2013 | France | ++ | **** | * | *** | 8 |
Tan et al [18] | 2020 | China | +− | **** | * | *** | 8 |
Peddi et al [19] | 2022 | United States | −+ | **** | ** | *** | 9 |
Stanton et al [20] | 2015 | United States | – | **** | * | *** | 8 |
Boekhout et al [21] | 2016 | Korea | ++ | **** | ** | *** | 9 |
Serie et al [23] | 2017 | United States | −+ | **** | ** | *** | 9 |
Udagawa et al [24] | 2018 | Japan | – | **** | ** | *** | 9 |
Nakano et al [25] | 2019 | Japan | – | **** | ** | *** | 9 |
Wang et al [26] | 2019 | United States | – | ** | ** | ** | 6 |
Zhang et al [27] | 2020 | China | +− | **** | ** | *** | 9 |
Feng et al [28] | 2021 | China | – | **** | ** | ** | 8 |
Mean Newcastle-Ottawa Scale score | 8.3 | ||||||