Table 1 Quality of the included studies
Study | Randomization method | Blind method | Allocation concealment | Withdrawals/Dropouts (NG/NJ) | Jadad score |
|---|---|---|---|---|---|
Bell 2015 | Computer-generated random numbers | Not used | An opaque, sealed envelope system | Yes | 5 |
Frat 2015 | Permuted-block randomization | Not used | Centralized web based management system | Yes | 5 |
Lemiale 2015 | Permuted-block randomization | Not used | An opaque, sealed envelope system | Yes | 5 |
Jones 2016 | Computer-generated random numbers | Not used | An opaque, sealed envelope system | Yes | 5 |