Table 2.
Assesment of the risks of bias
| Study | Low number of patients (10 or fewer) |
ND examined by less than 2 methods |
Random selection of patients |
Exact post-operative outcomes were not indicated for each patient |
|---|---|---|---|---|
| Morrison et al. [1] | - | - | - | - |
| Chrcanovic et al. [2] | - | + | + | + |
| Kan et al. [3] | + | - | + | - |
| Khajehahmadi et al. [4] | - | - | + | + |
| Ferrigno et al. [6] | - | - | - | - |
| Karlis et al. [7] | + | + | - | - |
| Kan et al. [8] | + | Not mentioned | - | - |
| Peleg et al. [10] | - | + | - | - |
| Del Castillo Pardo et al. [14] | + | + | - | - |
| Proussaefs [15] | + | + | - | - |
| Hashemi [16] | - | Not mentioned | + | - |
| Vasconcelos et al. [17] | + | Not mentioned | + | - |
| Hashemi [18] | - | + | - | - |
| Lorean et al. [19] | - | - | - | + |
| Gasparini et al. [20] | - | - | - | - |
| Barbu et al. [23] | + | + | - | + |
| Dal Ponte et al. [24] | + | + | + | - |
| Suzuki et al. [26] | + | Not mentioned | + | - |
| Proussaefs [27] | + | + | + | - |
ND = neurosensory disturbances.