Table 2. Risk of bias of the included studies.
| First author | Domains of the Cochrane risk-of-bias tool for randomised controlled trials (RoB-2) | |||||
|---|---|---|---|---|---|---|
| Domain 1 | Domain 2 | Domain 3 | Domain 4 | Domain 5 | Total | |
| Chua [24] | ||||||
| Lay [23] | ||||||
| Berger [25] | ||||||
| Estorninos [26] | ||||||
| Korpela [29] | ||||||
| Baglatzi [30] | ||||||
| Cooper [27] | ||||||
| Frese [31] | ||||||
| Garcia Rodenas [32] | ||||||
| Hurkala [33] | ||||||
| Roggero [34] | ||||||
| Yang [28] | ||||||
| Zhong [35] | ||||||
Green: Low risk of bias, yellow: Some risk of bias, red: High risk of bias.
Domain 1: Risk of bias arising from the randomisation process.
Domain 2: Risk of bias due to deviations from the intended interventions (effect of adhering to intervention).
Domain 3: Missing outcome data.
Domain 4: Risk of bias in measurement of the outcome.
Domain 5: Risk of bias in selection of the reported result.