Table 5. Quality assessment scores for included studies.
| Study | Selection Bias | Allocation Bias | Confounders | Blinding | Data Collection Methods | Withdrawals/Dropouts | Analyses | Global Rating |
| Polley et al. [54] | MODERATE | MODERATE | MODERATE | MODERATE | WEAK | MODERATE | STRONG | MODERATE |
| Asbee et al. [55] | MODERATE | STRONG | STRONG | MODERATE | MODERATE | MODERATE | WEAK | MODERATE |
| Huang et al. [56] | MODERATE | STRONG | STRONG | MODERATE | MODERATE | MODERATE | WEAK | MODERATE |
| Phelan et al. [57] | MODERATE | STRONG | STRONG | MODERATE | STRONG | STRONG | STRONG | STRONG |
| Wolff et al. [58] | MODERATE | MODERATE | STRONG | MODERATE | MODERATE | MODERATE | MODERATE | MODERATE |