TABLE 2.
Methodological quality assessment of SRs by AMSTAR-2.
| AMSTAR-2 | Chen et al. (2021a) | Xu et al. (2021) | Zhou et al. (2021) | Ma et al. (2017) | Zhang and Ke. (2016) | Zheng et al. (2015) | Jie R. et al. (2014) | Dond and Huang. (2011) | Li et al. (2010) | Yes [n (%)] |
|---|---|---|---|---|---|---|---|---|---|---|
| Item 1 | Y | Y | Y | Y | Y | Y | Y | Y | Y | 9 (100) |
| Item 2 | Y | N | N | N | N | N | N | N | N | 1(11.11) |
| Item 3 | N | N | N | N | N | N | N | N | N | 0 (0) |
| Item 4 | PY | PY | PY | PY | PY | PY | PY | PY | PY | 0(0) |
| Item 5 | N | Y | Y | N | Y | N | N | N | Y | 4 (44.44) |
| Item 6 | N | Y | Y | Y | Y | Y | N | N | Y | 6 (66.66) |
| Item 7 | Y | N | N | N | N | N | N | N | N | 1(11.11) |
| Item 8 | Y | Y | PY | PY | PY | PY | PY | PY | PY | 2 (22.22) |
| Item 9 | Y | Y | Y | N | Y | PY | Y | N | Y | 6(66.66) |
| Item 10 | N | N | N | N | N | Y | N | N | N | 1 (11.11) |
| Item 11 | Y | Y | Y | Y | Y | Y | Y | Y | Y | 9(100) |
| Item 12 | Y | Y | Y | N | Y | N | N | N | N | 4 (44.44) |
| Item 13 | Y | Y | Y | Y | Y | Y | N | N | Y | 7(77.77) |
| Item 14 | Y | Y | Y | N | N | Y | N | N | Y | 5 (55.55) |
| Item 15 | Y | Y | Y | N | Y | N | Y | N | N | 5(55.55) |
| Item 16 | Y | Y | N | N | N | N | N | N | N | 2 (22.22) |
| Ranking of quality | Low | Critically low | Critically low | Critically low | Critically low | Critically low | Critically low | Critically low | Critically low |
Y, yes; PY, partial yes; N, no; SRs, systematic reviews; Bold values are critical items of AMSTAR-2.