Table 2.
Quality assessment of RCTs and observational studies.
| Authors (year) | Study design | Tool for assessment | Quality |
|---|---|---|---|
| Karimi and Roshan [34] (2012) | RCT | Cochrane ROB tool | Poor |
| Repka and Hayward [35] (2016) | RCT | Cochrane ROB tool | Poor |
| Repka and Hayward [36] (2018) | RCT | Cochrane ROB tool | Poor |
| Katsourakis et al. [33] (2019) | RCT | Cochrane ROB tool | Poor |
| Jiang et al. [32] (2020) | RCT | Cochrane ROB tool | Good |
| Jones et al. [37] (2011) | Observational | STROBE | (21/33) intermediate |
| Guinan et al. [38] (2017) | Observational | STROBE | (18.5/33) intermediate |
| Tomasello et al. [39] (2015) | Observational | STROBE | (15.5/33) intermediate |
| Yen et al. [40] (2020) | Observational | STROBE | (18/33) intermediate |
| Domaszewska et al. [41] (2021) | Observational | STROBE | (16/33) intermediate |