Table 2.
Quality Assessment of the studies based on directness category.
| Study | Type of study | Sample | Patients (with SHL, uni or bilateral) | Therapy (IC uni or bilateral) | Outcome (evaluation of tinnitus perception after implantation) | Follow-up (≥ 6 months) | DoEa |
|---|---|---|---|---|---|---|---|
| Mertens G. et al. 19 | PCS | 23 | (+) | (+) | (+) | (+) | H |
| Dillon M.T. et al. 14 | PCS | 20 | (+) | (+) | (+) | (+) | H |
| van Zon A. et al. 6 | RCT | 38 | (+) | (+) | (+) | (+) | H |
| Punte A.K. et al. 20 | PCS | 14 | (+) | (+) | (+) | (-) | M |
| Quentin Summerfield A. et al. 21 | RCT | 24 | (+) | (+) | (+) | (-) | M |
| Liu Y. et al. 18 | RCT | 234 | (+) | (+) | (+) | (+) | H |
| Távora-Vieira D. et al. 22 | PCS | 28 | (+) | (+) | (+) | (+) | H |
| Ramakers G.G.J. et al. 15 | RCT | 38 | (+) | (+) | (+) | (+) | H |
| Di Nardo W. et al. 3 | PCS | 30 | (+) | (-) | (+) | (+) | M |
| Arts R.A. et al. 16 | PCS | 10 | (+) | (+) | (+) | (-) | M |
| Arts R.A. et al. 17 | RCS | 10 | (+) | (+) | (+) | (-) | M |
DoE, Directness of evidence; H, High; M, Moderate; PCS, Prospective case series; RCS, Retrospective case series; RCT, Randomized Controlled Trial.
a
Level of directness of evidence: A high directness of evidence was defined as a positive score on all criteria, moderate as a positive score on three out of the four criteria, and a low directness of evidence if they complied with less than three criteria.