Table 2.
Modified Newcastle-Ottawa quality assessment scale and total score of each study.
| Studies | Year | Modified Newcastle-Ottawa quality assessment scale |
Score | ||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |||
| Author | 2020 | – | – | – | * | * | 2 |
| Guo et al. (2020) | 2020 | * | * | – | – | – | 2 |
| Du et al. (2020) | 2020 | – | – | * | * | – | 2 |
| Huang and Zhao (2020) | 2020 | – | * | * | * | * | 4 |
| Lai et al. (2019) | 2020 | * | * | – | * | * | 4 |
| Liu et al. (2020) | 2020 | – | – | * | * | * | 3 |
| Liu et al. (2020) | 2020 | * | * | – | – | * | 3 |
| Lu et al. (2020) | 2020 | – | * | * | * | – | 3 |
| Qi et al. (2020) | 2020 | – | * | * | * | * | 4 |
| Tan et al. (2020) | 2020 | * | – | * | * | * | 4 |
| Zhang et al. (2020a) | 2020 | * | * | – | * | * | 4 |
| Zhang et al. (2020b) | 2020 | – | * | – | * | * | 3 |
| Zhu et al. (2020) | 2020 | – | * | – | * | * | 3 |
1. Representativeness of sample (no HCWs’ subgroup ≥ 65% of total sample); 2. Sample size > 600 HCWs; 3. Response rate > 80%; 4. The study employed validate measurement tools with appropriate cut-offs; 5. Adequate statistics and no need for further calculations.