Table 3 Quality Assessment
| Study | Selection Bias | Study Design | Confounders | Blinding | Data Collection Methods | Withdrawals and Drop-outs | Total |
|---|---|---|---|---|---|---|---|
| Adamo et al. 2016 [22]& Goldfield et al. 2016 [24] | Moderate | Strong | Weak | Moderate | Strong | Strong | Moderate |
| Engelen et al. 2013 [34] | Weak | Weak | Moderate | Moderate | Strong | Strong | Weak |
| O’Dwyer et al. 2012 [36] | Weak | Weak | Weak | Weak | Strong | Strong | Weak |
| Tortella et al. 2016 [35] | Weak | Weak | Weak | Weak | Strong | Weak | Weak |
