Table 1. Risk of bias for randomized controlled trials, assessed according to the revised Cochrane risk-of-bias tool for randomized trials (RoB 2).
| Publications | Random sequence generation | Allocation concealment | Blinding of participants, personnel and outcome assessors | Incomplete outcome data | Selective outcome reporting | Other bias |
|---|---|---|---|---|---|---|
| Montanari et al. [20] (2021) | L | S | L | L | L | L |
| Okamoto et al. [15] (2020) | L | S | L | L | L | H |
| Khan et al. [16] (2014) | L | S | L | L | L | L |
| Ohguro et al. [21] (2012) | L | S | H | L | L | L |
| Heneghan et al. [22] (2017) | L | S | H | L | L | L |
| Jeong et al. [14] (2016) | L | S | L | L | L | L |
| Cho et al. [23] (2020) | L | L | L | L | L | L |
| Franck et al. [24] (2020) | L | S | H | L | L | L |
| Jeong et al. [25] (2016) | L | S | L | L | L | L |
| Schell et al. [26] (2019) | L | S | H | L | L | L |
L, low risk of bias; H, high risk of bias; S, some concerns.