Table 3 Methodological quality of included studies
Study ID | Random sequence generation (selection bias) | Allocation concealment (selection bias) | Blinding of participants and personnel (performance bias) |
|---|---|---|---|
Kaya [34] | Random number table | Described blinding | All patients provided informed consent and were treated blindly |
Kaygin [33] | Described randomization | Described blinding | All patients provided informed consent and were treated blindly |
Fawzy [35] | Described randomization | Not described | All patients provided informed consent |
Zhao [29] | Random number table | Opaque envelope | All patients provided informed consent |
Kuralay [18] | Random number table | Not described | All patients provided informed consent |
Asimakopoulos [32] | Described randomization | Not described | Not described |
Ekim [20] | Described randomization | Not described | All patients provided informed consent |
Farsak [19] | Random number table | Not described | All patients provided informed consent |
Kongmalai [22] | Described randomization | Opaque envelope | Patients provided informed written consent individually |
Arbatli [21] | Described randomization | Not described | Not described |
Blinding of outcome assessment (detection bias) | Incomplete outcome data (attrition bias) | Selective reporting (reporting bias) | Other bias |
|---|---|---|---|
Described blinding | Complete | No | No |
Described blinding | Complete | No | No |
Not described | Complete | No | No |
Not described | Complete | No | No |
Not described | Complete | No | No |
Not described | Complete | No | No |
Not described | Complete | No | No |
Not described | Complete | No | No |
Researchers analyzed data blinded | Complete | No | No |
Not described | Complete | No | No |