Table 2.
Risk of bias assessment of randomized controlled trials
| Study | Random sequence generation (selection bias) | Allocation concealment (selection bias) | Blinding of participant (performance bias) | Blinding of personnel (personal bias) | Blinding outcome assessment (detection bias) | Incomplete outcome data (attrition bias) | Other bias |
|---|---|---|---|---|---|---|---|
| Macentee (2005) | |||||||
| Christache CM (2009) | |||||||
| Cune (2009) | |||||||
| Kappel S (2015) | |||||||
| Cepa S (2016) | |||||||
| Albuquerque RFD (2018) | |||||||
| Boven GC (2019) | |||||||
| Park JS (2019) | |||||||
| Taha NEKS (2019) | |||||||
| High risk of bias | |||||||
| Unclear risk of bias | |||||||
| Low risk of bias | |||||||