Table 2 Quality assessment of studies included in the systematic review by Newcastle-Ottawa Scale
N° | Source | Selection | Comparability | Exposure | Overall scorea | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5A | 5B | 6 | 7 | 8 | |||
1 | Zhao et al. [25] | * | * | 0 | 0 | * | NA | * | * | NA | 5 |
2 | Kang et al. [28] | * | * | * | 0 | * | NA | * | * | NA | 6 |
3 | Alavi-Naini et al. [26] | * | * | 0 | 0 | * | NA | * | * | NA | 5 |
4 | Zhao et al. [31] | * | * | * | 0 | * | NA | * | * | NA | 6 |
5 | Rosas-Taraco et al. [4] | * | * | * | 0 | * | NA | * | * | NA | 6 |
6 | Pacheco et al. [12] | * | * | * | 0 | * | NA | * | * | NA | 6 |
7 | Austin et al. [33] | * | * | 0 | 0 | * | NA | * | * | NA | 5 |
8 | Zheng et al. [23] | * | * | 0 | 0 | * | NA | * | * | NA | 5 |
9 | Xue et al. [24] | * | * | * | 0 | * | NA | * | * | NA | 6 |
10 | Hall et al. [30] | * | * | * | 0 | * | NA | * | 0 | NA | 5 |
11 | Pan et al. [32] | * | 0 | * | 0 | * | NA | * | * | NA | 5 |
12 | Ayaslioglu et al. [27] | * | * | * | 0 | * | NA | * | * | NA | 6 |
13 | Druszczyñska et al. [29] | * | 0 | 0 | 0 | * | NA | * | * | NA | 4 |